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Chironomidae. Midge larvae tend to be the most common macroinvertebrate at our sites. As with other Diptera, there are no true jointed legs. Chironomids do have a pair of prolegs at each end and preserved individuals tend to curl into a 'C'. Identification past family requires slide-mounted heads. NABS	Hydropsychidae. This family of net-spinning caddisflies is very abundant at several sites. Genus-level identification is possible for mature specimens. Look at the stream-specific sites to see what genera we have found. Cheumatopsyche and Ceratopsyche are both common. NABS	Baetidae. By far the most abundant mayfly in our samples. The most common genus we found was Baetis. NABS	Elmidae. We find adults and larval riffle beetles in the genera Stenelmis and Optioservus. The forward pointing tooth on the front end of the larvae as described in the key can be a challenge to see. NABS	Simuliidae. What's not to like about blackflies? Our second most common dipteran. Rather like a bowling pin with hands attached at the head end. We have not identified them past family at this point, but it is in the long-term plan. NABS
Philopotamidae. Our next most common caddisfly is once again a net spinner. Chimara is the most common genus we encountered. SMC The faint white 'T' shaped labrum extending from the front of the head past the mandibles in this picture is diagnostic for the family. The asymmetrical notch gets us to genus.	Nymphomyiidae	Ephemerellidae Drunella	Leuctridae Leuctra. Among our most common stoneflies, this family is fairly slender by stonefly standards. The divergent wing pads are a helpful characteristic. NABS	Baetidae Pseudoclueon
Tipulidae, Antocha. This small dipteran in the cranefly family is quite common. It is distinguished from most other dipterans we found by the 'creeping welts' that appear as prominent dark stripes along the abdomen. The dark head is usually partly exposed but sometimes pulled back in during preservation. NABS	Dytiscidae, Dytiscus. We found large numbers of small larvae in the Monroe Brook drainage in particular. Don't let the paired claws and prominent 'tails' tempt you to think 'stonefly'. These tails: are far less segmented than Plecoptera tails. The head and jaws are also unlike those of stoneflies: SMC	Heptageniidae Epeorus. A mayfly with two 'tails'! This family of mayflies has distinctly flattened heads, and this particular genus has two tails and a unique gill arrangement. NABS