They have hollow bones,only one ovary present
Birds
Birds have a number of traits that make them lighter, an adaptation for flight. The mait trait that makes birds lighter is that their bones are hollow.
kukukkukuku..........ya brids are sing during day light....
Hollow bones, curved wings to make them aerodynamic and light feathers to make them almost weightless.
bird bones are hollow. that is why they are light
birds can fly because they have such small, light bones in their wings.
Among other adaptations, birds have hollow bones to make for a very light skeleton, a large breastbone to attach flight muscles, and strong muscles in their chests for flight.
all birds are light because they have hollow bones
to make more birds
All birds are consumers because they cannot make their own food from light or break down dead tissue.
All birds are consumers because they cannot make their own food from light or break down dead tissue.
All birds are consumers because they cannot make their own food from light or break down dead tissue.