flying around in a cave with a stream
Flying around in tomo with good-sized stream
Found under a stone in forest stream. This might be Acanthophlebia.
Found under stone in forest stream. Narrow gills, pale patches on legs. Pale body with darker markings.
Found a couple of these under stones in forest stream. Stripey legs, narrow gills.
This small mayfly (body length only 10-12mm) was on the wall of the HQ at the fish hatchery. Roger Rohrbeck (on BugGuide) identified it as a subimago male of this genus, a member of the "Small Minnow Mayflies" (Baetidae).
Mayflies or shadflies are insects belonging to the order Ephemeroptera (from the Greek εφημερος, ephemeros = "short-lived" (literally "lasting a day" "daily" or "day-long"), πτερον, pteron = "wing", referring to the brief lifespan of adults). They have been placed into an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. They are aquatic insects whose immature stage (called "naiad" or, colloquially, "nymph") usually lasts one year in fresh water. The adults are...