Do Birds Have Endoskeletons?

Do Birds Have Endoskeletons? Do birds have Endoskeletons? Mammals, reptiles, birds, fish and amphibians are vertebrates with endoskeletons (skeletons inside their bodies). Their skeletons provide support and protection and help them to move. What is bird endoskeleton? Solution : The endoskeleton of birds is bony. <br> The long bones are hollow with air cavities (pneumatic).