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Riverfly Data

Riverfly Data

8459Total Samples Shown
52Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 359 | Average: 28

Caseless Caddis‡
Total: 100 | Average: 8

Mayfly (Ephemeridae)‡
Total: 93 | Average: 7

Blue-Winged Olive (Ephemerellidae)‡
Total: 134 | Average: 10

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 193 | Average: 15

Olives (Baetidae)‡
Total: 773 | 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.