Interesting theories around the 6 min mark.
I am not sure I have heard of this before. Steve may have as he is into Passenger pigeons. There is little data to support this and it is speculation for the most part but it highlights how little we know about ecology in North America. There are so many questions like what were pigeon populations like through time. Were they a biological storm in response to the loss of first nations on the land by disease after Columbus as I think Steve believes?
Dan Cover once showed me an oak tree in Thayer MO deformed but what he said were thousnds of passenger pigeons!
Yours in sport Harvey Leslie