Ruby Tail Wasp: Quick Guide to Their Intriguing World

folder_openHymenoptera, Insecta
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The Ruby Tail Wasp is a fascinating insect that you might encounter in your garden or local park. Known for its striking colors and unique behavior, there’s so much to learn about this one-of-a-kind creature. In this article, we’ll dive into everything you need to know about these flying jewels, so you can appreciate their presence next time you see them.

As you explore nature, one of the first things you’ll notice about Ruby Tail Wasps is their beautiful appearance. These small wasps are easily identifiable thanks to their vibrant, metallic hues, ranging from red, green, to blue. Not only are they visually stunning, but they also play an essential role in the ecosystem, helping to control pest populations.

It’s essential to understand their habitat, life cycle, and behavior if you want to preserve these lovely creatures for future generations to admire. In the following sections, we’ll provide you with all the necessary information about the Ruby Tail Wasp, from their preferred environment to their interactions with other insects. With this knowledge, you’ll be well-equipped to appreciate and protect these remarkable insects.

Understanding Ruby-Tailed Wasp

Defining Ruby-Tailed Wasp

Ruby-tailed wasps are a group of insects belonging to the family Chrysididae, commonly known as jewel wasps due to their brightly colored, metallic appearance. The most well-known species in this group is Chrysis ignita.

These wasps are small, usually less than 1 cm in length. Some key features of ruby-tailed wasps include:

  • Brilliant metallic colors, often a combination of red, green, and blue.
  • Parasitic nature; they lay their eggs inside the nests of other insects and wasp species.
  • A lack of stinger, which means they do not pose any danger to humans.

Just like many other insects, ruby-tailed wasps play an important role in the ecosystem. They help control other insect populations, especially those that may be harmful to the environment.

Now that you know more about ruby-tailed wasps, it’s easier to appreciate their unique features and significant contributions to the natural world. Enjoy observing these intriguing creatures while understanding their role in maintaining a healthy ecosystem.

Biology and Behavior

Kleptoparasitism in Ruby-Tailed Wasp

Ruby-tailed wasps are also known as cuckoo wasps due to their unique behavior: kleptoparasitism. These wasps lay their eggs in the nests of other host insects. Once the wasp larva hatches, it consumes the host’s own egg or larva along with their stored food.

Some examples of their common hosts are:

  • Mason bees
  • Leafcutter bees
  • Solitary wasps

Mating and Reproduction

Mating in ruby-tailed wasps is a brief, straightforward process. The male wasp transfers sperm to the female during mating, which then stores it in her special organ, the spermatheca. The female later decides when to fertilize her eggs using the stored sperm.

Fertilization and Development

Some fascinating aspects of their reproductive process include:

  • Unfertilized eggs develop into male wasps
  • Fertilized eggs develop into female wasps

The Sting of Ruby-Tailed Wasp

Unlike many other aculeates, ruby-tailed wasps don’t have the ability to sting humans. Their stingers are solely adaptive for depositing eggs in host nests. So, you don’t need to worry about receiving a painful sting from these beautiful creatures. Just admire their stunning colors from a safe distance.

Feature Ruby-Tailed Wasp Other Aculeate Wasps
Sting Non-venomous Venomous
Purpose Depositing Eggs Defense & Prey

Habitat and Distribution

The Ruby-Tailed Wasp is a fascinating insect known for its bright, metallic appearance and unique life cycle. In this section, we will focus on the habitat and distribution of the Ruby-Tailed Wasp, specifically in the Nordic and Baltic countries.

Ruby-Tailed Wasp in Nordic and Baltic Countries

The Ruby-Tailed Wasp can be found in a variety of habitats, such as gardens, woodlands, and meadows. They are especially attracted to areas with plenty of solitary bee nesting sites, as they parasitize their nests. In the Nordic and Baltic countries, you can find them in locations with a diverse range of flowering plants, which serve as a food source for both the wasps and their host bees.

  • Habitats: Gardens, woodlands, and meadows
  • Key locations: Areas with solitary bee nesting sites and diverse flowering plants

In comparison to other regions, the population of Ruby-Tailed Wasps in the Nordic and Baltic countries may be smaller and less diverse. However, they can still be found and observed during the warmer months of the year, particularly in sunny, sheltered spots. Keep an eye out for these stunning insects while exploring outdoor spaces in countries like Denmark, Estonia, Finland, Latvia, Lithuania, and Sweden.

As you enjoy these beautiful insects, remember to respect their habitat and allow them to thrive in their natural environment. Their presence is a sign of a healthy ecosystem and a rich diversity of plant and insect life. So, the next time you come across a Ruby-Tailed Wasp in the Nordic and Baltic countries, take a moment to appreciate its unique beauty and fascinating life cycle.

Role in the Ecosystem

Interaction with Bees and Other Insects

The Ruby Tail Wasp plays a unique role in its ecosystem. These wasps are part of the Hymenoptera order, which includes bees, ants, and other solitary wasps. They interact with other insects, especially bees, in various ways.

For example, Ruby Tail Wasps can be both beneficial and harmful to bee populations. As parasitic wasps, they may lay their eggs inside the nests of bees, where their larvae feed on the bee larvae, helping control bee populations. However, an excessive number of Ruby Tail Wasps could lead to a decline in bee populations, negatively impacting pollination and plant growth.

As a Naturalist’s Subject

Ruby Tail Wasps are fascinating subjects for naturalists as they exhibit intriguing behaviors and characteristics:

  • Vibrant colors: These wasps have stunning, metallic, ruby-colored tails, making them a visual delight for observers.
  • Parasitic nature: Their parasitic lifestyle provides insight into the complex relationships between insects in ecosystems.
  • Solitary behavior: Unlike social insects like ants or bees, Ruby Tail Wasps are solitary creatures, contributing to our understanding of insect diversity.

Though Ruby Tail Wasps may pose challenges to bee populations, their role in the ecosystem provides valuable insights for naturalists studying insect behaviors and relationships. Learning about these wasps can broaden our understanding of nature’s interconnectedness and the delicate balance that exists within ecosystems.

Physical Features of the Ruby-Tailed Wasp

Examining Under a Microscope

Ruby-tailed wasps, belonging to the family Chrysididae, are small but stunning creatures. When you take a closer look at them under a microscope, you will notice their intricate and fascinating characteristics. For example, the hairs on their body have a unique hook-like structure.

Their wing structure is also an interesting aspect to observe. The wings appear to have fine lines, known as strigil, which aid in their smooth flight.

Metallic Exoskeleton

These tiny bugs are popular for their bright metallic colors, which make them easy to spot in your garden or backyard. Their exoskeleton plays a significant role in their appearance and protection.

  • The ruby-tailed wasp’s exoskeleton is hard and shiny, allowing them to reflect sunlight.
  • Their metallic colors, which can range from red and green to blue and gold, are due to microscopic structures on their exoskeleton that refract light.
  • This colorful armor not only makes them appealing to the eye but also provides a defensive mechanism against predators by reflecting light and making them seem unpalatable.

By examining the ruby-tailed wasp’s physical features, you can gain a deeper appreciation for these extraordinary insects and the intricate details that make them unique.


In closing, the Ruby Tail Wasp is a fascinating creature with unique characteristics. Some key points about this wasp include:

  • Vibrant red coloration, which is eye-catching and intriguing.
  • Harmless to humans, as they do not sting, making them interesting subjects for observation.

It is essential to respect these incredible insects and their role in our ecosystem. By learning more about the Ruby Tail Wasp, you can appreciate the beauty and importance of this extraordinary creature.

Reader Emails

Over the years, our website, 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 – Ruby Tail Wasp


Subject: Beetle with metallic pink abdomen, green head
Location: Minsmere, Suffolk, UK
August 11, 2012 5:40 pm
I wonder if you can help here. The beetle was small and fast and the photo is poor, but I can’t find any pink and green beetles like it. Seen 11 Aug 2012, RSPB Minsmere, Suffolk, UK … sunny afternoon on a tank trap block (concrete) between beach and marsh. I took the photo.
Signature: CGill

Ruby Tail Wasp

Dear CGill,
This is not a beetle, but rather a Hymenopteran, the insect order that contains bees, ants and wasps.  After some careful internet research, we found an insect with this particular color pattern on the Heathland Solitary Wasps website, and it is called the Ruby Tail Wasp,
Hedychridium roseum.  The Bees, Wasps & Ants Recording Society (BWARS) website has a map an Suffolk is included in the limited UK range of the Ruby Tail Wasp.  We learned on that the Ruby Tail Wasp is classified as a Cuckoo Wasp, meaning that instead of providing for its own young, the female Ruby Tail Wasp lays an egg in the nest of another Hymenopteran and the developing larva eats the food that was collected for the host species larva.

Thank you, Daniel, so much for all this extremely interesting and helpful information. I’m only sorry the photo was so poor … it was a rush to get a pic. at all as the creature was scuttling towards a dark crevice in the concrete clock at break neck speed!


  • Bugman

    Bugman aka Daniel Marlos has been identifying bugs since 1999. is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

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  • Piyushi Dhir

    Piyushi is a nature lover, blogger and traveler at heart. She lives in beautiful Canada with her family. Piyushi is an animal lover and loves to write about all creatures.

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