A small number of birds, such as geese and other birds of the genus Haas, eat plants and leaves. This plant material is hard to digest and has low nutritional value, so they need to eat large amounts for energy.
Hummingbirds and small sunbirds extract nectar from flowers, which is rich in energy. These birds help pollinate flowers while feeding.
Some birds, such as bulbuls, eat the eggs and chicks of other birds as food.
Albatrosses eat squid and fish, and the resulting high-potency oil accumulates in their stomachs. They feed this oil to their young. When out at sea, the chicks are able to survive for a long time on this food.
Some vultures eat large quantities at once—so much that they become too heavy to fly.
Eagle owls are very powerful hunters, capable of hunting mammals like baby deer.
A woodpecker uses its beak like a spear to make holes in tree trunks for nests and to find insects under the bark.
Flamingos filter food from water through a filter on the edge of their upper beak. They pump water inside their beaks in a downward motion over the lower beak and tongue.
Birds of the crow family eat almost anything, including insects, spiders, earthworms, mammals, and crops. They are omnivorous birds.
Birds can digest their food very quickly. It takes only 15 minutes for a fruit to pass through their digestive system. Some birds take up to 3 hours to digest an entire mouse.
When small singbirds find out a snail they break the shells of snail and eat the insides as food.
