The baetis nymphs found in Colorado river systems can range in size from 16 to 22, so carry a variety of sizes to match. You'll notice that as it gets later in spring and the annual runoff ...

BWOs, or baetis are on the scene in spring and fall, and the fish are keyed in on them almost exclusively at this point. But this is just the tip of the iceberg. Just mentioning the word caddis causes ...

A series of experiments examined rates of prey consumption by mottled sculpins (Cottus bairdi) and perlid stoneflies (Agnetina capitata) separately, and when they were together in artificial streams.