yes, only birds have feathers. Robins, Ostriches, penguins, you name it. The whole bird family.
yes
Birds are the only things that have feathers and hollow bones.
No. Only birds have feathers. Kangaroos are mammals, not birds.
Cassowaries are birds so, like all birds, they have feathers. Only mammals have fur.
Mammals are not covered with feathers. Mammals grow hair, but do not have to be covered with hair. Birds are covered with feathers.
No. Birds are not mammals.
While the birds are the only currently living animals (specifically vertebrates) with feathers, the fossil record clearly shows that some species of the reptiles (specifically the dinosaurs) had feathers (and these are the ancestors of the birds).
Yes, as in the only living animals, they are. However, feathered dinosaurs, the ancestor of birds, also had feathers.
yes infact the penguin doesn't have feathers But they do. All birds have feathers of some sort.
Birds are the only animals with feathers unless you count the dinosaur-birds like archeopteryx. Look for their beaks, scaly legs, feathers and small eyes.
No. Marsupials are mammals, so they have fur or hair. Only birds have feathers.
No. Some exceptions are bats, mosquitos, flies, bees, ladybugs, locus, June beetles.