6036796 mayflies - Tricorythodes explicatus
Grand Teton NP Oxbow Bend are by dam, Wyoming, USA
August 30, 2020
I was shooting birds and so used telephoto lens. On Sept. 3 nearby I had huge numbers of Tricorythodes explicatus LITTLE STOUT CRAWLER MAYFLY (see 3024858 in BG) on a sheet.
I don't know how long the swarms last.
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