We don't. Aves is the group known as birds.
Penguins belong to a vertebrate group called aves.
The group of animals the Cat belongs to is called the Feline group.
Vertebrate is a category called a subphylum. Catfish belong to this subphylum or group. A catfish is a vertebrate.
fish
They are amphibians
reptiles
reptiles
The apes
bird
reptile
The vertebrate group in which humans belong to is the mammal group.Humans belong to the Mammal group.
Sharks belong to the vertebrate group known as Fish. Specifically, they belong to the vertebrate group known as Chondrichthyes - all sharks and rays - which have skeletons of cartilage rather than bone.