Mark Melton Life of the Party Nov 26, 2022 #1 Siphlonurus nymphs are usually found in warmer, shallower water in the Russian River. The substrate consists of small gravel and rocks with a coating of algae. Mature nymphs are approximately 14-17 mm in length, not including cerci or antennae.
Siphlonurus nymphs are usually found in warmer, shallower water in the Russian River. The substrate consists of small gravel and rocks with a coating of algae. Mature nymphs are approximately 14-17 mm in length, not including cerci or antennae.