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Riverfly Data

Riverfly Data

9198Total Samples Shown
56Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 349 | Average: 27

Caseless Caddis‡
Total: 101 | Average: 8

Mayfly (Ephemeridae)‡
Total: 87 | Average: 7

Blue-Winged Olive (Ephemerellidae)‡
Total: 162 | Average: 12

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

Olives (Baetidae)‡
Total: 784 | Average: 60

Stoneflies (Plecoptera)‡
Total: 71 | Average: 5

Freshwater Shrimp‡
Total: 2207 | 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.