Riverfly and FBA logos

Riverfly Data

Riverfly Data

8291Total Samples Shown
45Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 334 | Average: 26

Caseless Caddis‡
Total: 95 | Average: 7

Mayfly (Ephemeridae)‡
Total: 90 | Average: 7

Blue-Winged Olive (Ephemerellidae)‡
Total: 132 | Average: 10

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 185 | Average: 14

Olives (Baetidae)‡
Total: 764 | Average: 59

Stoneflies (Plecoptera)‡
Total: 69 | Average: 5

Freshwater Shrimp (Gammarus)‡
Total: 2171 | Average: 167

†

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.