* Mammals: Mammals such as cats, dogs, coyotes, and foxes can prey on birds, especially ground-nesting birds and their eggs.
* Reptiles: Snakes and lizards can eat birds, especially eggs and young birds.
* Amphibians: Frogs and salamanders can eat bird eggs and tadpoles.
* Fish: Some fish, such as trout, can eat young birds that fall into the water.
* Invertebrates: Insects, such as ants and beetles, can eat bird eggs and young birds.