Thanks Taxon, and interesting. Though there isn't still/slow water around for a 2.5-3 miles. I supposed he came in on a good breeze? I do have water 50 ft away, but it spends most of the year moving at a decent clip. Are they more inclined towards moving water than I realize?
It doesn't take much still water to support Callibaetis. For example, I am aware of their ova being deposited (by a gravid female) in a partially overturned wheelbarrow, with the water being replenished by periodic rainfall, and resulting in an Callibaetis emergence perhaps (7) weeks later.
I’ve got two lakes both about 5 miles away. I also have horses and 100 gallon water troughs where callibaetis hatch usually in mid March so
I get to watch the nymphs swimming around with two species of water boatmen.