
Riverfly Data
8994Total Samples Shown
56Trigger Level Breaches
Groups
Cased Caddis‡‡Total: 353 | Average: 27
Caseless Caddis‡‡Total: 104 | Average: 8
Mayfly (Ephemeridae)‡‡Total: 89 | Average: 7
Blue-Winged Olive (Ephemerellidae)‡‡Total: 176 | Average: 14
Flat-Bodied Stone Clinger (Heptageniidae)‡‡Total: 178 | Average: 14
Olives (Baetidae)‡‡Total: 810 | Average: 62
Stoneflies (Plecoptera)‡‡Total: 70 | Average: 5
Freshwater Shrimp‡‡Total: 2191 | Average: 169
†
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.