The group of vertebrates that are most closely related to birds is reptiles.
Although the dwelling reptiles birds are most carefully associated to are crocodilians (archosaurs), when it comes to their relation to dinosaurs, birds developed from theropod dinosaurs. These theropods share over a hundred qualities with current birds.
Crocodiles are the closest dwelling family of the birds, sharing a frequent ancestor that lived round 240 million years in the past and additionally gave upward push to the dinosaurs.
Birds are vertebrates
Reptiles
The group of vertebrates most closely related to birds are probably the dinosaurs.
There are five groups of vertebrates; fish, amphibians, reptiles, birds and mammals.
Both birds and sharks are vertebrates whereas starfish are not.
Birds. Reptiles are also vertebrates.
The 5 groups of vertebrates are fish,amphibians,mammals,reptiles and birds. Vertebrates are animals with a backbone.
Birds
They are warmblooded animals. Both are vertebrates and so the bone structures are broadly similar. Birds are more closely related to Reptiles than to mammals.
Mammals and birds are endothermic.
No. Despite sharing some characteristics mammals and birds are not closely related.
Birds are more closely related to reptiles than they are to mammals. Birds, reptiles, and mammals all belong to a group of vertebrates called amniotes, which split off from amphibians. Amniotes split into two groups soon after they evolved: true reptiles and synapsids. Mammals are the only living synapsids today. Dinosaurs branched off from the reptiles and birds then evolved from the dinosaurs.
They are not THAT closely related; bats are mammals, not birds. Both mammals and birds are vertebrate animals.
Phylum Chordata: Subphylum Cephalochordata and Urochordata along with the subphylum Craniata