Basic : All birds have feathers, beaks/bills, two feet, wings, and lay eggs.
More complex: All birds have crops, gizzards, a four chambered heart, and are warm-blooded.
All birds have feathers - a beak - no teeth - lay hard shelled eggs
Feathers
It is Platypus.
birds can fly because they have such small, light bones in their wings.
a lightweight skeleton
Birds have feathers, which serve multiple functions such as insulation, waterproofing, and aiding in flight. Feathers are a unique feature of birds that help them to maintain body temperature, display colorful patterns during courtship, and enable them to fly.
Ribs
yes. They both have beaks; what else do you need? if you took all the feathers off of a (land) bird, it'd look like a squid. In conclusion, squids are birds.
yes all birds have two birds
It is a declarative sentence.
birds dum one
yes all birds have beaks