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Riverfly Data

Riverfly Data

31380Total Samples Shown
842Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 1903 | Average: 31

Caseless Caddis‡
Total: 511 | Average: 8

Mayfly (Ephemeridae)‡
Total: 552 | Average: 9

Blue-Winged Olive (Ephemerellidae)‡
Total: 720 | Average: 12

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 764 | Average: 13

Olives (Baetidae)‡
Total: 3844 | Average: 63

Stoneflies (Plecoptera)‡
Total: 357 | Average: 6

Freshwater Shrimp‡
Total: 11830 | Average: 194

†

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.