(Latin: bird, birds)
Aves are almost completely covered with feathers, and scales are usually present on the feet.
The beak, or bill, is covered with a horny sheath and all of the living Aves are toothless and the heart is four-chambered, and there are extensive air sacs between the visceral organs.
The Aves are oviparous and it is estimated that there are 8600 species which have been described.2. Etymology: from Latin plural of avis, bird.
Here is one kind of avian animal that is about to catch a mouse to eat.
2. A large cage, house, or enclosure, in which birds are kept: The local zoo has several aviaries for people to see.
Aviary: a cage big enough to give birds an illusion of freedom.
2. To fly in the air as birds normally do it.
2. Etymology: from Latin avis, "bird" + -ationem, "an action, a process."
Refashioned after French aviateur. See aviation for origin of this word.
Sometimes aviculture is also used to keep birds in captivity for biological studies.