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Caddisfly larva



bizzare small insect, body appears to be covered by tiny pebbles, lives in cold freshwater, has only been identified down to order, anything more specific would be appreciated


temperate forest, freshwater


I spotted a few of the insects in the water where they washed clothes. I took one out of the water to photograph it. Last photo is of it in the water.

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LarsKorb 9 years ago

yes, I meant freshwater, Dan.

dandoucette 9 years ago

Thanks for the info Lars, that makes a lot of sense now. What do you mean sweetwater? Like freshwater?

LarsKorb 9 years ago

These are indeed tiny rocks on it's back. Caddisfly larvae collect anything they can find for the construction of their selfmade, camouflaging and covering home. Here's my spotting of a sweetwater specimen:

dandoucette 9 years ago

I know, eh Frank! Really amazing camouflage!

Frank Weaver
Frank Weaver 9 years ago

This is really amazing. I could swear those were tiny rocks on its back!

dandoucette 9 years ago

Thanks rhiannon, you're totally right. I do see some similar looking insects online. I would say the water system they were in was really healthy, so that is a good sign.

rhiannon 9 years ago

a caddis fly of some sort, we get them in Wales in rivers. Usually a sign of a healthy river/stream system.

dandoucette 9 years ago

You're probably right Emma, they look very much like little pebbles moving with the current.

Hema  Shah
Hema Shah 9 years ago

Bizzarre! Good mimicry though! they could pass for pebbles to the sea gulls flying above!

Spotted by

Paracel Islands

Spotted on Nov 26, 2011
Submitted on Jan 31, 2012


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