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Riverfly Data

Riverfly Data

10271Total Samples Shown
97Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 381 | Average: 29

Caseless Caddis‡
Total: 118 | Average: 9

Mayfly (Ephemeridae)‡
Total: 102 | Average: 8

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

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 149 | Average: 11

Olives (Baetidae)‡
Total: 687 | Average: 53

Stoneflies (Plecoptera)‡
Total: 72 | Average: 6

Freshwater Shrimp‡
Total: 2322 | Average: 179

†

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.