Los Gatos, Oka Percolation Ponds, Santa Clara County, California, USA March 23, 2007 Size: ~20-25 mm
These big chubby guys come out in the spring and fly around in the willows where Coyote Creek flows into the percolation ponds. In Sunnyvale I find them in the Coyote Brush at the WPC ponds. They seem to have a short flight season -- a couple of weeks and they're gone. The females are all black.