Yes. Peacocks, like all birds, are vertebrates. They have a backbone and an internal skeleton, which are the characteristics shared by vertebrates.
Class Aves.
Penguins belong to a vertebrate group called aves.
The vertebrate group in which humans belong to is the mammal group.Humans belong to the Mammal group.
The apes
reptiles
reptiles
reptile
fish
They are amphibians
bird
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.
chordata
mammals