From Deer Creek, Arizona, USA
I never heard of it but impressive.
“We found that after the larger bodied cats went extinct, the jaguar became the top carnivore and shifted its diet to focus on bison, probably largely babies—a niche previously filled by the extinct cats,” Smith said. “Mountain lions who had been previously absent likely because of competition became common and lynx also shifted their diet and body size.”
more updates later
This is a simulation of a passenger pigeon flock. Its accuracy is likely faulty since the pigeons were gone before video but it gives a possible impression of what it was like.
I think Steve is still working on a passenger pigeon book.