The article seems to focus mainly on “backyard” birds that eat seeds, insects, etc. so predatory birds (like hawks, owls, etc), foxes, snakes, coyotes will probably take a hit. The populations of other things the predators eat will also be stressed since they will be hunted and consumed more frequently when there is less variety.
Food chain collapse starts at the bottom, with the tiny things, then the small things.
What comes after birds?
The article seems to focus mainly on “backyard” birds that eat seeds, insects, etc. so predatory birds (like hawks, owls, etc), foxes, snakes, coyotes will probably take a hit. The populations of other things the predators eat will also be stressed since they will be hunted and consumed more frequently when there is less variety.