yes they can becasue if the bones are hollw they cant fly
A brids' bones are hollow They have feathers They have beaks
There is no record of any brids living in Antarctica.
Birds have evolved from the same common ancestor as reptiles, they have many homologous characteristics. What makes them different however is that birds have hollow bones and many other key characteristics to make them lighter. They do not defy gravity, they are lighter and spread that light body weight over a great volume of air to support their mass.
These are birds and have bones in their wings like other birds and even very similar to human arms and fingers. They are covered with feathers.
yes
One
yes
a pop star!
Yes
same brids can swim
Ornithologist
Amphibians are vertebrates, and have backbones and skeletons. Invertebrates do not have a backbone. Some have skeletons, though--arthropods (including crustaceans and insects) have a hard exoskeleton made of chitin.