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Riverfly Data

Riverfly Data

7170Total Samples Shown
57Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 411 | Average: 32

Caseless Caddis‡
Total: 99 | Average: 8

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

Blue-Winged Olive (Ephemerellidae)‡
Total: 125 | Average: 10

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 171 | Average: 13

Olives (Baetidae)‡
Total: 703 | Average: 54

Stoneflies (Plecoptera)‡
Total: 63 | Average: 5

Freshwater Shrimp (Gammarus)‡
Total: 2208 | Average: 170

†

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.