These are all examples of caddisflies, collected during an aquatic insect and crustacean field trip on the Missisquoi River by our fifth and sixth graders. You can see the caddisfly emerging from their homes of pieces of twigs, plants and silk that they make. 
Interestingly, caddisflies and stoneflies are signs that the water in which they live is very clean.
Each case that the individual flies make is unique.
This is one of the most fascinating bugs I have ever learned about.
Caddisflies are popular bait for trout fishing.
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