11.   The cutting of trees along the stream bank -- the riparian zone -- has deprived some aquatic insects of the leaf litter on which they feed.

12.   This aquatic insect, the Brachaycentrus solomoni, is a member of the caddis family.

13.   This destroys the habitat of aquatic insects and smothers fish eggs.

14.   Van Put says that if the weather followed its present pattern, fly-fishers could anticipate earlier-than-usual hatches of aquatic insects.

15.   We took stream temperatures, checked water levels, and surveyed for aquatic insects.

16.   When aquatic insects metamorphose from bottom-crawling larvae into winged flies and lift off the surface of the water, anglers call it a hatch.