Riverfly and FBA logos

Riverfly Data

Riverfly Data

9123Total Samples Shown
63Trigger Level Breaches

Scores†
Average Score: 13

Count Distribution‡

Groups

Cased Caddis‡
Total: 339 | Average: 26

Caseless Caddis‡
Total: 94 | Average: 7

Mayfly (Ephemeridae)‡
Total: 83 | Average: 6

Blue-Winged Olive (Ephemerellidae)‡
Total: 136 | Average: 10

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 158 | Average: 12

Olives (Baetidae)‡
Total: 707 | Average: 54

Stoneflies (Plecoptera)‡
Total: 68 | Average: 5

Freshwater Shrimp‡
Total: 2162 | 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.