Currently viewing the category: "Fireflies and Glowworms"
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Male Western Banded Glowworm

Male Western Banded Glowworm or Male Firefly

Male Western Banded Glowworm in Mount Washington
Location:  Mount Washington, Los Angeles, California
April 3, 2015 10:00 PM
After a very long and busy day today, we arrived back at the office to find this male Western Banded Glowworm on the windowsill, and rather than to answer any requests that came in today, we decided to wait until morning and post our own first sighting in our yard and to wait until tomorrow to look at new mail.  We are feeling a bit inadequate that the images of a Western Banded Glowworm male we found on BugGuide are so much more detailed than our own.
  In trying to find a link to our own site, we found this other possibility, a male Firefly, Pterotus obscuripennis.

Sue Dougherty, Alfonso Moreno, Carol Love, Kathy Haines, Robin Powell, Andrea Leonard Drummond liked this post
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Subject: Some kind of grub
Location: San Jose, CA
February 10, 2015 12:15 am
I found this guy in early Feb in a hurry to go under my chest freezer. It was pretty long, maybe 3″ or so, and was moving pretty quickly. Any ideas? Thank you!
Signature: Jonathan

Western Banded Glowworm

Western Banded Glowworm

Dear Jonathan,
Had you turned out the lights, you might have been treated to a light show from this Western Banded Glowworm,
Zarhipis integripennis.

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Subject: Glowworm or Firefly Larva
Location: NE New Jersey, zip 07838
November 26, 2014 11:32 am
As I read that these can be tricky to ID, I’d appreciate your input.
I found it because it had it’s little light stuck in the air out of a grass covered bank along the side of the old Free Union United Methodist church. It was just a pin-prick of light, but bright enough to catch my eye.
Geographic location: NE New Jersey, zip 07838
Date: October 14, 2014
Temperature – 68F (using the Jenny Jump weather station historical data.)
Signature: Phil Wooldridge

Firefly Larva

Firefly Larva

Dear Phil,
This is a Firefly Larva, and we are basing that identification on the information that you provided about seeing a light.  Firefly Larvae are not easily confused with Glowworms which also bioluminescnce.  Firefly Larvae most closely resemble, hence are confused with Netwing Beetle Larvae that are not capable of emitting light. 

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Aquatic Larva

Aquatic Firefly Larva

Subject: Unknown aquatic macroinvert
Location: Huntington, Indiana
October 11, 2014 9:27 am
Hey bugman!
The college ecology class I teach found this critter while sampling a small, wooded creek on our campus. I’ve shown the picture to a couple of aquatic ecologists I know and none of them have been able to identify it yet. The best we can come up with is that it is some sort of free living caddisfly (Trichoptera). The “shell” looks a lot like an aquatic isopod though! It definitely had only 6 legs. ~1.5-2 cm in length.
Any ideas?
Signature: Collin Hobbs

Hi Collin,
We haven’t a clue as to the identity of your creature, but we wonder if it might be the larva of an aquatic beetle because it really resembles a Firefly Larva or a Netwing Beetle Larva.  We are not certain if there are any aquatic beetle larvae that look like this, but we believe that is a more likely candidate than the larva of a Caddisfly.  We will try contacting Eric Eaton to see if he can provide any information.

Eric Eaton confirms our identification
On my way out the door, but….
Looks like a firefly larva to me, and there are species that prey exclusively on aquatic snails….
Eric

Ed. Note:  Beetles in the Bush and Cambridge Journals Online both have articles on aquatic Firefly Larvae.

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Subject: glowworm?
Location: Missouri, USA
September 27, 2014 3:09 pm
I’m not quite sure on this one, I’m thinking it’s either a glowworm or a trilobite beetle? there’s a bit of pinkish coloring on the underside and its slow moving and calm. not too large or anything
Signature: Stolz

Firefly Larva

Firefly Larva

Dear Stolz,
Glowworms are larvae and larviform females of beetles in the family Phengodidae, and coincidentally, we just finished posting an image of a Glowworm.  Your individual is a Firefly Larva in the family Lampyridae, and though both families are known for Bioluminescence, they are distinct families, even though we have categorized them together on our site.  You can compare your image of a Firefly larva to images posted to BugGuide.

Firefly Larva

Firefly Larva

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Subject: Centipede Looking Creature
Location: Raleigh NC
September 27, 2014 11:02 am
I was out in my back yard walking around and I saw this bug crawling along on the ground. I pulled out my phone and took some pictures. Could you tell me what I saw?
Signature: Joe S.

Glowworm

Glowworm

Dear Joe,
If you had the ability to darken the surroundings, you would have had a nice surprise because this is a Glowworm or Railroad Worm.  They are bioluminescent, hence they glow at night.  Your individual is in the genus
Phenogodes, and you can get additional information on BugGuide.

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