Riverfly and FBA logos

Riverfly Data

Riverfly Data

10877Total Samples Shown
98Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 331 | Average: 25

Caseless Caddis‡
Total: 118 | Average: 9

Mayfly (Ephemeridae)‡
Total: 139 | Average: 11

Blue-Winged Olive (Ephemerellidae)‡
Total: 126 | Average: 10

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 137 | Average: 11

Olives (Baetidae)‡
Total: 553 | Average: 43

Stoneflies (Plecoptera)‡
Total: 74 | Average: 6

Freshwater Shrimp‡
Total: 1979 | Average: 152

†

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.