Sparrows, the Old World sparrows in the family Passeridae, are small passerine birds. Generally, sparrows tend to be small, plump brown-grey birds with short tails and stubby, powerful beaks. The differences between sparrows species can be subtle. They are primarily seed-eaters, though they also consume small insects.
Sparrow is physically similar to other seed-eating birds, such as finches, but have a vestigial dorsal outer primary feather and an extra bone in the tongue.
Kingfishers of all three families beat their prey to death, either by whipping it against a tree or by dropping it on a stone.They are able to see well both in air and under water. To do this, their eyes have evolved an egg-shaped lens able to focus in the two different environments.
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