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Riverfly Data

Riverfly Data

9808Total Samples Shown
93Trigger Level Breaches

Scores†
Average Score: 13

Count Distribution‡

Groups

Cased Caddis‡
Total: 351 | Average: 27

Caseless Caddis‡
Total: 105 | Average: 8

Mayfly (Ephemeridae)‡
Total: 92 | Average: 7

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

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 162 | Average: 12

Olives (Baetidae)‡
Total: 691 | Average: 53

Stoneflies (Plecoptera)‡
Total: 65 | Average: 5

Freshwater Shrimp‡
Total: 2101 | Average: 162

†

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.