I did not say I did. I'm telling you what kills them. It's more than a few if you add up the entire peninsula of florida twice a year.
In Florida, I've seen many areas where the big besting birds (cranes, etc) nested in for YEARS totally wiped out by growth. THey nest in fields not trees. They're gone. You don't see them anymore. So many trees were wiped out too, so the birds don't have many places to live. Also, down here, some developements don't allow you to feed the birds. I have both cats and birds that I feed in my back yard(land which belongs to the association not me) but the cats never have killed a bird. Because I feed the cats. I have cardinals, some small new red breasted birds, woodpeckers, black birds of course and pigeons/doves, blue jays...) I have many generations of cardinals. The cats will lay under the very tree/bush where my neighbor and I hang the birdfeeders. Not one bird is killed. I've had a dove fly into my kitchen window and kill itself and I've had a hawk fly down and grab a dove and eat it alive. I also have many racoons...who you know climb trees and steal the birds eggs. Raccoons LOVE eggs. Everyone forgets that they are the Main bird egg stealers. Cats don't steal eggs.. Also, we used to have otters in the canals. No more....suburban growth. So dont' blame the cats.
So what is your suggestion? Put up road blocks and stop people from moving to Florida?