Near the Toolik Lake Research Station, approximately 1 km upstream and 2 km downstream of where the Kuparuk River crosses the Dalton Highway in arctic Alaska. A rock-scrubbing sampling technique was used to collect samples at several different stations, with two replicates at each station. Samples were collected approximately every three days. The same sampling procedure was used for all dates. The samples were preserved in ethanol then picked, sorted, counted, and measured in Duluth using a digitizing pad.
All insect measurements are from larval forms unless noted otherwise.