This video is of two separate diving beetles on two separate days, each attached somehow to a mayfly-form. The second one turned loose of his mayfly and I snagged it out of the water: it was more like a shed skin than a dead fly with substance--not much there to feed a beetle.
What are the beetles doing with these mayflies and why do the beetles seem so unintentional? They seem to be more drifting than directional.
They seemed so passive I wasn't sure who had ahold of whom! McDowell Creek, Geary Co., Kansas, June 2020.
I hope someone can help me understand this scenario!