Riverfly and FBA logos

Riverfly Data

Riverfly Data

32630Total Samples Shown
823Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 1892 | Average: 31

Caseless Caddis‡
Total: 506 | Average: 8

Mayfly (Ephemeridae)‡
Total: 540 | Average: 9

Blue-Winged Olive (Ephemerellidae)‡
Total: 687 | Average: 11

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 760 | Average: 12

Olives (Baetidae)‡
Total: 3791 | Average: 62

Stoneflies (Plecoptera)‡
Total: 351 | Average: 6

Freshwater Shrimp‡
Total: 11576 | Average: 190

†

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.