We have some trees on our property that are dropping flowering seeds. These small strands, about one to two inches and produce purple flowers. This string of flowers is known as a catkin. The other day I threw one of these in for our chickens and they gobbled it up. This is great because our property is littered with catkins right now and they are free source of food that the land is producing in the early spring.
The hardest thing was figuring out what the trees were. After a bit of discovery, it turns out they are poplars.