Green colored caddisfly larva.
larger and brighter colored than most caddisflies I see here.
Floating in the water
Spring Bioblitz 2013
ID by BG and can't get any closer than genus, which is more than I expected.
The caddisflies are an order, Trichoptera, of insects with approximately 12,000 described species. Also called sedge-flies or rail-flies, they are small moth-like insects having two pairs of hairy membranous wings. They are closely related to Lepidoptera (moths and butterflies) which have scales on their wings, and the two orders together form the superorder Amphiesmenoptera. Caddisflies have aquatic larvae and are found in a wide variety of habitats such as streams, rivers, lakes, ponds, spring seeps, and...