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Riverfly Data

Riverfly Data

10864Total Samples Shown
109Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 345 | Average: 27

Caseless Caddis‡
Total: 113 | Average: 9

Mayfly (Ephemeridae)‡
Total: 139 | Average: 11

Blue-Winged Olive (Ephemerellidae)‡
Total: 126 | Average: 10

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 127 | Average: 10

Olives (Baetidae)‡
Total: 578 | Average: 44

Stoneflies (Plecoptera)‡
Total: 68 | Average: 5

Freshwater Shrimp‡
Total: 2047 | Average: 157

†

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.