Baetis.  Silver Creek, Idaho

First, think cold.  Arrived at the Nature Conservancy section of Silver Creek this morning around 10:15 and it was 25 degrees.  By 2:30 it had warmed up to at least 37 degrees and there were as many baetis on the water as you can imagine.  Nobody on the river either...

Nikon D3s, Nikon 14-24 ƒ2.8 lens