Where Are Fireflies Found? Uncovering Their Enchanting Habitats

Fireflies, also known as lightning bugs, are fascinating creatures that light up the night with their enchanting glow. You might be curious about the regions in which these unique insects can be found. Fireflies inhabit various parts of the world, with over 2,000 species discovered globally.

In the United States alone, there are more than 170 species thriving in different environments. While certain species can be found throughout the nation, others have specific regional habitats. Knowing where to find these illuminated beetles can enable you to experience their magical display in person.

What are Fireflies?

Fireflies, also known as lightning bugs, are fascinating creatures that light up summer evenings. They belong to the Lampyridae family, which consists of more than 2,000 different species worldwide. In case you didn’t know, these glowing insects are actually beetles and not flies.

Most of their life cycle is spent as larvae, feeding on snails, worms, and smaller insects. The adult fireflies have a relatively short lifespan, with many of them living for just 3-4 weeks. Surprisingly, some adults do not even eat during this time!

Now, you might be curious about their famous glow. Fireflies produce light through a process called bioluminescence, which involves chemicals called luciferin and luciferase. This magical light display is not just for show – it has a purpose. Fireflies use their flashes to communicate and attract mates.

Let’s look at some features of fireflies in bullet points:

• Belong to the beetle family
• Produce bioluminescent light
• Short adult lifespan (3-4 weeks)
• More than 2,000 species worldwide

So next time you see these enchanting insects lighting up the night, you’ll know a little more about the fascinating life of fireflies.

Basic Anatomy of Fireflies

Adult Fireflies

Adult fireflies, also known as lightning bugs, are nocturnal beetles that belong to the family Lampyridae. They have a fascinating luminescent abdomen, which they use for communication and attracting mates. Some firefly species feed on nectar or pollen, while others consume insects, including other firefly species. Adult fireflies have a short lifespan of only a few weeks, during which they mate and lay eggs ¹.

In general, adult fireflies have:

• An inch-long body ²
• Wings for flight
• Luminescent abdomen for producing light

Firefly Larvae

Firefly larvae spend most of their lifecycle (1-2 years) in the larval stage ³. During this stage, they primarily reside in the leaf litter on the forest floor. They have a unique ability to produce light, similar to adult fireflies, but in a more subtle manner. Firefly larvae are predators that feed on snails, worms, and smaller insects.

Key characteristics of firefly larvae include:

• Luminescent abdomen
• Predatory nature
• 1-2 year lifecycle before maturing into adult fireflies

By understanding the basic anatomy of fireflies, you can better appreciate their fascinating features and complex life cycle.

Reproduction and Life Cycle

Mating and Breeding

During mating season, fireflies often engage in complex and fascinating courtship rituals. Males actively search for females, using their unique bioluminescence as a way to attract potential mates. When a female spots a male with a desirable light pattern, she will respond in kind, signaling her interest.

Fireflies typically mate on plant leaves or branches. After mating, females lay their eggs on or just beneath the surface of the soil or on moist vegetation nearby. They may deposit up to 100 eggs, which hatch into larvae after about 3 weeks.

From Egg to Adult

• Eggs: Firefly eggs are tiny and often laid in clusters. They are generally well-hidden in soil or moist habitats for protection.
• Larvae: The hatched larvae resemble tiny worms and start to feed on small insects or snails. They are equipped with bioluminescence, just like their adult counterparts.
• Pupa: After a few months or years of growing, larvae enter the pupa stage. They create a small cocoon and undergo metamorphosis, preparing to transform into a mature firefly.
• Adult: Once the metamorphosis process is complete, the adult firefly emerges from the pupa. They are now fully-grown and ready to begin reproduction, starting the life cycle anew.

In summary, the firefly life cycle begins with mating, followed by egg-laying and hatching. The larvae then grow and feed until they develop into pupae, where they undergo metamorphosis. Finally, adults emerge, ready to reproduce and continue the cycle. Understanding this lifecycle not only allows you to appreciate these fascinating insects but also helps to protect and conserve their natural habitats.

Distinct Features

Light Production

Fireflies, also known as lightning bugs, are famous for their incredible ability to produce light. This phenomenon, called bioluminescence, occurs in the abdomen of these insects. Here’s a quick breakdown of some key features of their light production:

• The light is produced by a chemical reaction in the firefly’s body.
• The color of the emitted light varies between yellow, green, orange, and even blue.
• Not all species of fireflies can produce light; some are non-luminescent.

While you might spot fireflies near the ground during the day, they are most active during nighttime. You can often find them in forested areas and meadows, making their glowing displays even more mesmerizing.

Different Flash Patterns

A fascinating aspect of fireflies is that they have unique flash patterns. These patterns vary between species and serve multiple purposes. Some of the main reasons for differing flash patterns are:

• Mating: Males use their flashing lights to attract females, with the females responding in kind, helping the males locate them.
• Defense: The flash patterns can also serve as a warning to predators, signaling that the fireflies might not be a suitable meal.

Here are some examples of flash patterns:

In summary, fireflies are a unique group of insects known for their bioluminescent abilities, with their light production occurring in their abdomen. The different flash patterns displayed by these insects serve purposes such as mating and defense. Each species has its distinct flash pattern in various colors and durations, making them a remarkable part of the natural world.

Geographical Distribution

Fireflies are fascinating insects known for their enchanting glow. They can be found in various parts of the world, including both North America and Asia.

In the United States, fireflies are commonly seen in the eastern parts of the country, particularly in the Great Smoky Mountains. However, they are not limited to this region. In fact, Georgia is home to over 50 species of fireflies, making it the state with the highest number of firefly species in the U.S. They can also be found in many other states like North Carolina, where 30 to 40 species have been identified.

Fireflies typically thrive in wet and humid habitats, such as marshes, wetlands, and forests. These conditions are most commonly found in tropical climates, which explains why fireflies are abundant in parts of Asia. Some fascinating examples of firefly habitats include the mangrove forests of Southeast Asia and the rice paddies of Japan.

In the Americas, fireflies can be found as far south as Argentina, with species distributed across Central and South America. However, they tend to be less common in arid regions like the western United States, as fireflies require permanent water sources to support their larval stage.

To summarize, fireflies can be found in various regions across North America, Asia, and the Americas, with the highest concentrations in humid, tropical habitats. As you explore the outdoors during the warm summer nights, keep an eye out for the enchanting glow of fireflies, and appreciate the beauty of these unique creatures.

Habitats of Fireflies

Temperate Environments

In temperate environments, fireflies are commonly found in forests, fields, and grassy areas near ponds and streams. These habitats provide them with abundant food sources and safe breeding grounds. For example, some fireflies thrive in the leaf litter of the forest floor, where they feed on snails, worms, and smaller insects 1.

• Forests: Rich in food, shelter, and breeding sites
• Fields and grassy areas: Suitable for fireflies that prefer open spaces

Tropical Environments

Fireflies are also found in tropical environments such as humid forests and marshes. In these warm and moist habitats, they benefit from the abundant plant life, which provides them with ample hiding and breeding spots. Different species of fireflies prefer different habitats; some spend most of their time in the upper branches of trees, while others reside closer to the ground 2.

• Humid forests: High humidity promotes plant growth and provides ideal living conditions
• Marshes: A combination of water and vegetation creates a perfect habitat

In both temperate and tropical environments, fireflies display a broad range of appearances and flash patterns, allowing them to adapt to their surroundings. Florida alone is home to 56 different species 3. So whether you’re exploring a temperate woodland or the lush expanse of a tropical rainforest, there’s a good chance of encountering these fascinating creatures.

Diet of Fireflies

During their life cycle, fireflies have different dietary preferences depending on their stage of development. Let’s delve into what these fascinating creatures eat.

As larvae, fireflies primarily feed on invertebrates like snails and slugs. They have been known to consume worms and smaller insects as well. This stage lasts for about 1 to 2 years, providing them ample time to feast on a variety of prey found in the leaf litter on the forest floor ¹.

When it comes to adult fireflies, their diet changes quite a bit. Many adult fireflies have no need to feed and only live for about 3-4 weeks ¹. However, some may consume pollen and nectar, helping them acquire vital nutrients and energy. This allows them to search for mates and reproduce.

In conclusion:

• Larval fireflies feed on invertebrates like snails, slugs, worms, and smaller insects.
• Adult fireflies may consume pollen and nectar, though many do not feed.

Overall, the diet of fireflies varies greatly during their life cycle, from feasting on invertebrate prey as larvae to potentially forgoing food altogether as adults.

Threats and Conservation

You may want to know that fireflies face several threats, which include habitat loss, light pollution, and pesticide use. As a result, some species are at risk of extinction. Factors like habitat loss and pesticide use are detrimental to fireflies’ populations, but a less known fact is that artificial light poses a significant threat to these creatures.

Considering fireflies’ habitats, you should know that they can be found all throughout Florida in grassy areas, sandy soils, and areas with scattered trees. However, such habitats are increasingly threatened by human activities and climate change, which lead to the decline of their suitable living environments.

Additionally, predation is a part of the natural life cycle of these insects. But human interventions are leading to an imbalance in their ecosystem, resulting in a decline in their populations. To address these concerns, organizations like the Xerces Society are focusing on the conservation of invertebrates like fireflies.

Here are some steps that can be taken to protect fireflies:

• Reducing light pollution by using shielded or low-intensity lights
• Avoiding pesticide use or opting for eco-friendly alternatives
• Preserving and restoring natural habitats like forests, wetlands and grasslands
• Raising awareness and promoting conservation efforts among communities

In conclusion, it is crucial to understand the threats that fireflies face and work together to promote their conservation for future generations to experience the magic and beauty of these incredible insects.

Research and Discoveries

When it comes to fireflies, these fascinating creatures have caught the interest of many scientists and researchers alike. Their ability to produce light is governed by a process called bioluminescence, which involves the chemical luciferin reacting with oxygen. As you explore the world of fireflies, you’ll come across some interesting findings.

For example, not all fireflies produce light. Some day-flying species rely on pheromone signals instead of light patterns to find mates Discover the Secret Science of Fireflies. Comparing these two types of fireflies might reveal the variety in their ways of communication.

As for where fireflies are commonly found, your best bet is to look for them in areas with permanent water sources. In Florida, you can spot them in grassy regions, sandy soil, or spread-out trees Where to Find Florida Fireflies. Similarly, finding fireflies in New Mexico can be a challenge due to their reliance on water sources Fireflies in New Mexico.

So, during your next firefly-hunting adventure, remember that:

• Fireflies’ bioluminescence is a result of luciferin and oxygen interaction
• Not all fireflies produce light, with some day-flying species using pheromones instead
• Look for fireflies in locations with permanent water sources

Don’t hesitate to immerse yourself in the enchanting world of these tiny luminescent insects. Their unique features and habitats will surely pique your curiosity.

Role in Culture and Science

Fireflies have long played a significant role in culture and science. On a summer evening, their glowing presence adds magic to our surroundings. These fascinating insects, also known as glowworms, have piqued the curiosity of scientists for decades and influenced various aspects of art and folklore.

The science behind the fireflies’ glowing mechanism is quite remarkable. Their bioluminescent properties attract mates and even help them ward off predators. One intriguing aspect of firefly behavior is the synchronous flashing patterns. The synchronous fireflies in the Great Smoky Mountains National Park display an awe-inspiring display, synchronizing their flashes in a captivating dance.

These glowing phenomena have not only inspired a sense of wonder in individuals but have also served as a catalyst for science education. Studying fireflies encourages students to understand and appreciate the delicate balance of the natural world. Conservation biology, field studies, and connecting seemingly unrelated phenomena all come into play, fostering a passion for research and discovery.

In popular culture, fireflies are often associated with meaningful symbolism. They remind us to shine our light, even in the darkness, and encourage us to chase our dreams. As fleeting as their adult life may be – lasting only about 3-4 weeks – these tiny creatures leave a lasting impression on human imagination.

Fireflies can even be found in astronomical interpretations. The Big Dipper, a prominent constellation in the night sky, also carries a connection to these creatures. In some cultures, the seven stars of the Big Dipper are envisioned as sparkling fireflies lighting up the heavens.

In summary, fireflies hold a special place in both culture and science. From their captivating glow to their fascinating synchronous behavior, these tiny insects serve as inspiration, education, and a unique connection to the natural world. So, the next time you gaze at a summer evening sky or marvel at the synchronous fireflies, take a moment to appreciate the intricate beauty and significance of these enchanting creatures.

Conclusion

In this article, we learned that fireflies are found in various parts of the world, including North Carolina and across the United States with over 2,000 known species. You discovered that not all fireflies glow, as many non-glowing species are located in the Western U.S.

Throughout their life cycle, fireflies spend most of their time (1-2 years) as larvae, feeding on creatures like snails and worms. As adults, they have a significantly shorter lifespan of around 3-4 weeks¹.

You’ve also seen how different species of fireflies can produce various colors of bioluminescence, ranging from green to orange-yellow. This fascinating ability is used as a mating dance between male and female fireflies.

Now that you are more familiar with fireflies and where they can be found, you can appreciate the magical glow of these remarkable insects even more.

Reader Emails

Over the years, our website, whatsthatbug.com has received hundreds of letters and some interesting images asking us about these insects. Scroll down to have a look at some of them.

Letter 1 – Firefly Larva from South Africa

It is a Worm, but looks like he is armour plated
November 27, 2009
Hi Bugman
I wonder if you could help us?
My two boys, Ronin (9) and Raith (7) found this bug in the garden under dry leaves about 3 weeks ago. No one seems to know what it is, but he looks armour plated and yet has a snail like head? My boys have named him Rolanaith ( A mixure of all our names ) AKA Nathan. 🙂
We keep him in a big container inside with lots of dark brown garden sand, moist flowers, green leaves, dry and wet, some grass and ground cover etc .. as to create his home environment and this is changed regulary.
We seem to find him under the flowers most of the time. If you touch him, he also glows, he has two spots on either side of him at the bottom of his body and he glows bright green. HE has become our pet … 🙂 but we dont really know what he is, what he eats, what the correct environment is for him etc. please let me know as soon as possible. We dont want him to die, but after 3 weeks, he is still very much alive .. We look forward to your urgent feedback.
Lance, Angela, Ronin & Raith
Kwazulu Natal, Durban

Hi Lance, Angele, Ronin and Raith,
This is a Firefly larva, also called a Lightning Bug.  It is a beetle in the family Lampyridae.  Adults fly and flash their lights to signal mates, but the light in the larva is believed to be a defense mechanism to warn predators of the Firefly’s powerful chemical defense that has an unpleasant taste.  It sounds like your environment is fine, but you need to provide food.  According to BugGuide:  “Nocturnal, some live in moist places under debris on the ground, others beneath bark and decaying vegetation.   Food Larvae prey on small animals including snails.”  Our knowledge of world geography is sometimes lacking, and we needed to look up that Kwazulu Natal, Durban is in South Africa.

Oh my word, THANK YOU! I cannot tell you how much we appreciate your input. THANK YOU. So does this mean that it will develop into a fire fly? It is so big?

Larvae are often larger than the adults.  This might also be an adult female as the females are often larviform

Letter 2 – Firefly Larva from Arizona

Subject: Sabino canyon , Tucson AZ glow worm
Location: tucson. AZ, USA
September 27, 2015 10:06 pm
i ran across this bug during a night walk in Sabino Canyon, Tucson, AZ. It has a green glow in the tail.
It was in a riparian area but I found it on land crawling between two bodies of water.
I thought it might be s hellgrammite , but have not found a picture that is similar
Signature: thanks, Lance

Dear Lance,
This is not a Glowworm.  It is a Firefly Larva and they are in distictly different families.  We believe your individual is in the genus Microphotus which is limited to western states.  Your individual looks very similar to this BugGuide image of Microphotus angustus, but that species is only reported in California.  Four other members of the genus are reported in Arizona, according to BugGuide, but no images of the larva are available.  Then again, it might be a member of a different genus.

Letter 3 – Fireflies from Ohio

Subject:  Male and Female Fireflies
Location:  Mahoning Valley, Ohio
August 6, 2013
Astute visitors to our website know that our editorial staff has been out of the office since July 30 due to family matters.  Northeast Ohio where we stayed has had an unusual summer.  Spring was late and tomatoes are just beginning to ripen in August. The local corn was quite delicious.  July was very wet and August was unseasonably cool.  The first week of August produced several thunderstorms and the nights were warm.  We were thrilled that there was a nice population of Fireflies lighting up the early evening and fond memories of our youth flooded back.

We did manage to capture and photograph a nice male Firefly, but he flew off after getting a single image, so we attempted a second capture.  There was a flickering signal coming from a phlox plant in the flower garden at the family home, so we captured the bioluminescent insect only to discover that it had vestigial wings, indicating a female of the species. 

We took her indoors, cooled her in the refrigerator for a few minutes and got some relatively decent images using the long obsolete digital camera we took with us specifically to photograph the insects we encountered.  There are probably thousands of identification requests and comments that accumulated in our mailbox during our two and a half week absence that are awaiting our immediate attention, but we can’t resist posting a few of our own submissions as we try to post the most interesting letters that arrived while we were away.  Perhaps one of our more knowledgeable readers will be able to identify the genus or species of Firefly we have photographed.

Letter 4 – Netwing Beetle Larva from Mexico

I have no clue what is it
Sat, Nov 22, 2008 at 10:14 PM
I found it climbing an small concrete wall, close to were I’m building my new home and while I usually have at least an idea of what a bug is, this time I have not clue what so ever,it’s lengt is around an inch long and I found it in the summer, is it a larva of some sort?
Jorge Farias
Jalisco, Mexico

Hola Jorge,
We believe this is a Firefly Larva. Beetle Larvae, and larvae in general, are often quite difficult to exactly identify to the species level. Fireflies are beetles, and the larvae eat snails and slugs. We wish we had Fireflies in Los Angeles, not only because of the night display, but because of the garden snails and slugs that eat our lettuce and other tender plants.

Hi, Daniel:
Wow, you have been very busy posting!  I turn my back for a week and….wham!  LOL!
… Ok, I think that covers it for now.  Oh, wait, that “lampyrid larva” from Mexico is much more than likely the larva of a net-winged beetle, family Lycidae.
Eric

Letter 5 – Firefly Larva from Bolivia

Bolivian giant larva

Bolivian giant larva
Location: Samaipata, Bolivia
July 17, 2011 8:15 am
It is killing me not knowing what this giant is! I saw this amazing creature in Amboro National Park, Samaipata, Bolivia. It looks like a very, very large firefly larva. It has bioluminescent spots just like a firefly larva. The only problem is it was about 4 in / 10cm long! Found it wandering across a path midday last November, the begining of rainy season. I found another one at my house in Pailon, Bolivia but it was only 1.5 inches.
Signature: Jason

Hi Jason,
We agree that this must be a Firefly Larva, though we would never have guessed it was four inches long.  The bioluminescent spots are a very good indication that your identification is correct.  We wish you had included a night shot.  Perhaps one of our readers will be able to assist in a species identification.  Your photographs are quite stunning.

I can’t help but wonder if this could be a case of neoteny.  I cannot imagine an adult firefly this size larva would produce!  It is also possible it is an unsubscribed species, there are new discoveries being made in this relatively unexplored forest all the time. Not long ago they found a new species of Monkey there.  I am sorry I didn’t get a night shot.  I have been doing a lot of digging and asking around to ID this guy with no luck so far.
Jason

Just a few additional thoughts Jason.  Many female adult Fireflies are larviform.  Many larvae are larger than the adults.  Please provide us with a comment on your posting if you ever get any additional information in the future.

Letter 6 – Firefly Larva from Canada

Subject:  Mysterious glowing multi-legged critter
Geographic location of the bug:  Terre Noire, Cape Breton, Nova Scotia, Canada
Date: 03/30/2018
Time: 05:01 PM EDT
Your letter to the bugman:  Photo taken at 9:26 pm (Atlantic time) September 27, 2017 at the brushy edge of my long rural driveway. On a number of nights, I saw a faint glow in several places on the ground as I was walking. When I investigated, I saw this character moving slowly and glowing at the edges of its sides. Never saw more than one at a time in any given spot, but some weren’t far from each other. I think it was approx 5-7cm long.
How you want your letter signed:  Andrew

Dear Andrew,
This sure looks to us like the larva of a Firefly, and since you did observe it glowing, your observation does lend credence to our identification.  Some Firefly larvae are capable of bioluminescence.

Letter 7 – Firefly Larva from Peru

Subject:  Bug found on inca trail
Geographic location of the bug:  Valle sagrado, Peru
Date: 02/06/2020
Time: 05:09 PM EDT
Your letter to the bugman:  Hey bug man! Found this interesting looking creature walking across the path! It has some pretty cool Armour!
How you want your letter signed:  Matt

Dear Matt,
This is a Beetle Larva in one of two families.  Our first choice is a Firefly Larva in the family Lampyridae, but we would not discount that it might be a Net-Winged Beetle Larva in the family Lycidae.  Larvae from the two families are difficult to differentiate from one another.

Reader Emails

Over the years, our website, whatsthatbug.com has received hundreds of letters and some interesting images asking us about these insects. Scroll down to have a look at some of them.

Letter 1 – Firefly Larva from South Africa

It is a Worm, but looks like he is armour plated
November 27, 2009
Hi Bugman
I wonder if you could help us?
My two boys, Ronin (9) and Raith (7) found this bug in the garden under dry leaves about 3 weeks ago. No one seems to know what it is, but he looks armour plated and yet has a snail like head? My boys have named him Rolanaith ( A mixure of all our names ) AKA Nathan. 🙂
We keep him in a big container inside with lots of dark brown garden sand, moist flowers, green leaves, dry and wet, some grass and ground cover etc .. as to create his home environment and this is changed regulary.
We seem to find him under the flowers most of the time. If you touch him, he also glows, he has two spots on either side of him at the bottom of his body and he glows bright green. HE has become our pet … 🙂 but we dont really know what he is, what he eats, what the correct environment is for him etc. please let me know as soon as possible. We dont want him to die, but after 3 weeks, he is still very much alive .. We look forward to your urgent feedback.
Lance, Angela, Ronin & Raith
Kwazulu Natal, Durban

Hi Lance, Angele, Ronin and Raith,
This is a Firefly larva, also called a Lightning Bug.  It is a beetle in the family Lampyridae.  Adults fly and flash their lights to signal mates, but the light in the larva is believed to be a defense mechanism to warn predators of the Firefly’s powerful chemical defense that has an unpleasant taste.  It sounds like your environment is fine, but you need to provide food.  According to BugGuide:  “Nocturnal, some live in moist places under debris on the ground, others beneath bark and decaying vegetation.   Food Larvae prey on small animals including snails.”  Our knowledge of world geography is sometimes lacking, and we needed to look up that Kwazulu Natal, Durban is in South Africa.

Oh my word, THANK YOU! I cannot tell you how much we appreciate your input. THANK YOU. So does this mean that it will develop into a fire fly? It is so big?

Larvae are often larger than the adults.  This might also be an adult female as the females are often larviform

Letter 2 – Firefly Larva from Arizona

Subject: Sabino canyon , Tucson AZ glow worm
Location: tucson. AZ, USA
September 27, 2015 10:06 pm
i ran across this bug during a night walk in Sabino Canyon, Tucson, AZ. It has a green glow in the tail.
It was in a riparian area but I found it on land crawling between two bodies of water.
I thought it might be s hellgrammite , but have not found a picture that is similar
Signature: thanks, Lance

Dear Lance,
This is not a Glowworm.  It is a Firefly Larva and they are in distictly different families.  We believe your individual is in the genus Microphotus which is limited to western states.  Your individual looks very similar to this BugGuide image of Microphotus angustus, but that species is only reported in California.  Four other members of the genus are reported in Arizona, according to BugGuide, but no images of the larva are available.  Then again, it might be a member of a different genus.

Letter 3 – Fireflies from Ohio

Subject:  Male and Female Fireflies
Location:  Mahoning Valley, Ohio
August 6, 2013
Astute visitors to our website know that our editorial staff has been out of the office since July 30 due to family matters.  Northeast Ohio where we stayed has had an unusual summer.  Spring was late and tomatoes are just beginning to ripen in August. The local corn was quite delicious.  July was very wet and August was unseasonably cool.  The first week of August produced several thunderstorms and the nights were warm.  We were thrilled that there was a nice population of Fireflies lighting up the early evening and fond memories of our youth flooded back.

We did manage to capture and photograph a nice male Firefly, but he flew off after getting a single image, so we attempted a second capture.  There was a flickering signal coming from a phlox plant in the flower garden at the family home, so we captured the bioluminescent insect only to discover that it had vestigial wings, indicating a female of the species. 

We took her indoors, cooled her in the refrigerator for a few minutes and got some relatively decent images using the long obsolete digital camera we took with us specifically to photograph the insects we encountered.  There are probably thousands of identification requests and comments that accumulated in our mailbox during our two and a half week absence that are awaiting our immediate attention, but we can’t resist posting a few of our own submissions as we try to post the most interesting letters that arrived while we were away.  Perhaps one of our more knowledgeable readers will be able to identify the genus or species of Firefly we have photographed.

Letter 4 – Netwing Beetle Larva from Mexico

I have no clue what is it
Sat, Nov 22, 2008 at 10:14 PM
I found it climbing an small concrete wall, close to were I’m building my new home and while I usually have at least an idea of what a bug is, this time I have not clue what so ever,it’s lengt is around an inch long and I found it in the summer, is it a larva of some sort?
Jorge Farias
Jalisco, Mexico

Hola Jorge,
We believe this is a Firefly Larva. Beetle Larvae, and larvae in general, are often quite difficult to exactly identify to the species level. Fireflies are beetles, and the larvae eat snails and slugs. We wish we had Fireflies in Los Angeles, not only because of the night display, but because of the garden snails and slugs that eat our lettuce and other tender plants.

Hi, Daniel:
Wow, you have been very busy posting!  I turn my back for a week and….wham!  LOL!
… Ok, I think that covers it for now.  Oh, wait, that “lampyrid larva” from Mexico is much more than likely the larva of a net-winged beetle, family Lycidae.
Eric

Letter 5 – Firefly Larva from Bolivia

Bolivian giant larva

Bolivian giant larva
Location: Samaipata, Bolivia
July 17, 2011 8:15 am
It is killing me not knowing what this giant is! I saw this amazing creature in Amboro National Park, Samaipata, Bolivia. It looks like a very, very large firefly larva. It has bioluminescent spots just like a firefly larva. The only problem is it was about 4 in / 10cm long! Found it wandering across a path midday last November, the begining of rainy season. I found another one at my house in Pailon, Bolivia but it was only 1.5 inches.
Signature: Jason

Hi Jason,
We agree that this must be a Firefly Larva, though we would never have guessed it was four inches long.  The bioluminescent spots are a very good indication that your identification is correct.  We wish you had included a night shot.  Perhaps one of our readers will be able to assist in a species identification.  Your photographs are quite stunning.

I can’t help but wonder if this could be a case of neoteny.  I cannot imagine an adult firefly this size larva would produce!  It is also possible it is an unsubscribed species, there are new discoveries being made in this relatively unexplored forest all the time. Not long ago they found a new species of Monkey there.  I am sorry I didn’t get a night shot.  I have been doing a lot of digging and asking around to ID this guy with no luck so far.
Jason

Just a few additional thoughts Jason.  Many female adult Fireflies are larviform.  Many larvae are larger than the adults.  Please provide us with a comment on your posting if you ever get any additional information in the future.

Letter 6 – Firefly Larva from Canada

Subject:  Mysterious glowing multi-legged critter
Geographic location of the bug:  Terre Noire, Cape Breton, Nova Scotia, Canada
Date: 03/30/2018
Time: 05:01 PM EDT
Your letter to the bugman:  Photo taken at 9:26 pm (Atlantic time) September 27, 2017 at the brushy edge of my long rural driveway. On a number of nights, I saw a faint glow in several places on the ground as I was walking. When I investigated, I saw this character moving slowly and glowing at the edges of its sides. Never saw more than one at a time in any given spot, but some weren’t far from each other. I think it was approx 5-7cm long.
How you want your letter signed:  Andrew

Dear Andrew,
This sure looks to us like the larva of a Firefly, and since you did observe it glowing, your observation does lend credence to our identification.  Some Firefly larvae are capable of bioluminescence.

Letter 7 – Firefly Larva from Peru

Subject:  Bug found on inca trail
Geographic location of the bug:  Valle sagrado, Peru
Date: 02/06/2020
Time: 05:09 PM EDT
Your letter to the bugman:  Hey bug man! Found this interesting looking creature walking across the path! It has some pretty cool Armour!
How you want your letter signed:  Matt

Dear Matt,
This is a Beetle Larva in one of two families.  Our first choice is a Firefly Larva in the family Lampyridae, but we would not discount that it might be a Net-Winged Beetle Larva in the family Lycidae.  Larvae from the two families are difficult to differentiate from one another.