Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

Phryganeidae Caddisfly Larva Pictures

 This "specimen" is actually two caddis larvae fighting each other over a case. The case is a hollow tube; one larva would go in the back end, presumably bite the other, and chase it out. The invader crawled forward into the case while the other one fled, and then it went around to the back and bit the first one. They did this several times, and I recorded it on video.

This caddisfly was collected from unknown on March 1st, 2004 and added to on January 25th, 2006.

Video Clip

Two Phryganeidae caddis larvae fighting over a case
Caddisfly larvae of this family can easily leave and re-enters their cases. I caught two of them playing musical chairs or something with this one... funny!
Date ShotMar 1, 2004
Date AddedMar 31, 2006


Recent Discussions of this Larva

this video is fascinating! 15 Replies »
Posted by Creno on Oct 23, 2011
Last reply on Oct 26, 2011 by Oldredbarn
Not sure why I didn't see this before - just another hidden wonder on your site I guess. Did you notice they seem to run around the short side of the case? I suspect they should know what side is the short side is but still..... why? Energy conservation doesn't make alot of sense since if they were conserving energy it would seem they would have quit alot earlier. What happened after they stopped? Did they start over? I thought they would have tired out way before they did. Did you have a hot light on the tray? absolutely fascinating! Thanks

Start a Discussion of this Larva:

You must log in at the top of the page to post. If you haven't registered yet, it's this easy:

Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.
Top 10 Fly Hatches
Top Gift Shop Designs
Top Insect Specimens
Miscellaneous Sites