Masses and masses of Yellow-headed Blackbirds at a slough complex near Crosby, NoDak. This particular slough is always a good spot for waterfowl, however, yesterday it was a staging ground for 750+ of my favourite blackbirds. The road, ND Hwy #5, goes pretty well nowhere in either direction, and is usually busy. Yesterday was no exception. The birds would fly up each time a vehicle passed.