Nothing.
Anything in a feeder will attract many different birds (and squirrels, mice, rats, ...)
Birds of prey, such as goshawks and pine martens eat European red squirrels. Domestic cats also like to eat European red squirrels.
Different hawks eat different things. Some, like red tailed and red shouldered, eat mainly rodents and snakes, frogs. Others, like Cooper's hawks, eat mainly birds.
no
Red pandas eat mostly bamboo, and may eat small mammals, birds, eggs, flowers, and berries. In captivity, they were observed to eat birds, flowers, maple and mulberry leaves, and bark and fruits of maple, beech, and mulberry.
birds like penguins and gulls eat fish.
Yes, they do eat birds like ducks and wading birds.
The commonly known red birds like the cardinal, or the tanager are not carnivores, but have been known to eat insects from time to time.
birds like to eat food
Some birds, like falcons, eat smaller birds, but large birds who aren't birds of prey don't
Small birds, small rodents like mice, grasshoppers, lizards, smaller snakes, spiders.
Birds like to eat them
It depends on which type of hawk you mean. Accipiters like the Cooper's hawk, primarily feed on other birds. Buteos like red tailed hawks feed mainly on rodents. Falcons like peregrines eat mainly birds, but the smaller falcons like the kestrel eat mice and insects as well.