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These data describe the distribution and abundance of Hydropsyche, a widespread and diverse genus of net-spinning caddisflies, in the Colorado River Basin. Abundance data, measured as catch rates, were collected by citizen scientists using light traps. We subsampled Hydropsyche spp. from light trap samples collected throughout the Colorado River Basin and measured the lengths and widths of mesothoracic tibia and first tarsal segments. Samples and measurements were processed at Grand Canyon Monitoring and Research Center in Flagstaff, AZ.


map background search result map search result map TL1012 Hydropsyche auricolor lateral TL1012 Hydropsyche auricolor vent post TL1012 Hydropsyche auricolor ventral TL1012 Hydropsyche confusa vent head TL1012 Hydropsyche confusa ventral TL1012 Hydropsyche occidentalis dor ant TL1012 Hydropsyche occidentalis vent ant TL1012 Hydropsyche orris ventral TL1012 Hydropsyche simulans ventral apotome TL1012 Hydropsyche simulans lateral Adult net-spinning caddisfly (Hydropsyche spp.) catch rates and morphology from large rivers of the southwestern United States, 2015-2016 Adult net-spinning caddisfly (Hydropsyche spp.) catch rates and morphology from large rivers of the southwestern United States, 2015-2016