
Riverfly Data
8932Total Samples Shown
48Trigger Level Breaches
Groups
Cased Caddis‡‡Total: 349 | Average: 27
Caseless Caddis‡‡Total: 102 | Average: 8
Mayfly (Ephemeridae)‡‡Total: 91 | Average: 7
Blue-Winged Olive (Ephemerellidae)‡‡Total: 144 | Average: 11
Flat-Bodied Stone Clinger (Heptageniidae)‡‡Total: 195 | Average: 15
Olives (Baetidae)‡‡Total: 821 | Average: 63
Stoneflies (Plecoptera)‡‡Total: 72 | Average: 6
Freshwater Shrimp‡‡Total: 2160 | Average: 166
†
Scores in this chart are calculated from the average monthly counts for each species group. The chart includes data derived from Urban and Extended Riverfly samples. Select a site using the map or menu bar to plot its trigger level alongside the scores.
‡
Values in this chart represent average monthly counts for each species group. The chart includes data derived from Urban and Extended Riverfly samples.