Some amazing hunters, like eagles , have eyesight that is five to six times sharper than a person's. They can spot small prey from a mile away. Birds spend most of their time looking for food . Birds mostly use their keen eyesight to find food. They use their beak and their claws to get bugs , worms , small mammals , fish , fruit , grain, or nectar .
Birds play a very important part in the natural control of insects and in the dispersal of seeds.
Some birds, like the tiny, nectar-eating hummingbird are important pollinators of some flowering plants .