The food of owls mainly includes the following categories:

Small mammals: such as rats, squirrels, voles, etc., are common food sources for owls.

Birds: Owls will also prey on some small birds, such as sparrows, pigeons, etc.

Insects: Some species of owls prey on insects such as moths and beetles.

Other animals: In some areas, owls may also prey on snakes, lizards, frogs, etc.