Trent Elementary School
Pleasant Hill, Oregon

Our third grade class studied several  large buckets of pond water, obtained by our teacher in a helipond in a forest 
not far from our school. In our study we found:

11 dragonfly nymphs
41 damselfly nymphs
66 scuds
33 water fleas
4 midge larvae
1 mosquito larva
7 snails
29 little black beetles