Identificaciones de sallypsandpiper

I know that there were several of these, but how many?
Had a horrible time getting shots. I tried having the camera set for a space they passed thru, and watching for them about to enter my window, but they went so fast! I finally fell back on shooting from the hip.
This is a collection of the least-lousy shots from one side of the lake.
There were other odes on the site; tenerals fluttering past and vanishing, and dragonflies I flushed without getting a shot :(
But I was very glad to see these (even though they were a lot of effort for truly awful photos).