0
The main reasons involve the feathers and the skeleton. Special feathers are required for flight and the "Flightless Birds" have none of these special feathers. There is a unique part of the breastbone called the ridge. An extended part in the center of the breastbone is where the stronger muscles used for the wing movement are anchored. Finally the flightless birds have solid bones to transfer blood and oxygen through the bones themselves. Flight able birds have hollow bones to actually lighten the internal structure and weight of the bird. They also have much heavier blood vessels to transfer blood and oxygen to the limbs.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What are some similarities between cats and birds?
cats like to chase and eat birds, and birds like to fly to get away from cats.
You have blue birds that are flying into your windows and hanging on your screens this is continuous land and fly into the window again Why?
Birds do not understand reflections. Often they fly into glass to attack the other bird they see there.
What do hollow-boned birds eat?
Except for a few kinds of flightless varieties (e.g. ostrich, emu, penguin), all birds are hollow-boned (semi-hollow, to be exact). Birds eat all sorts of different things, from nectar to rabbits -- it depends on the species.
When does the fossil record indicate when birds first began to fly?
in three weeks
Is feathers an adaptation related to flight in birds?
The birds feathers are used for, insulation , this is for when they fly and when thier on the ground, it also helps pretect the skin, from getting damaged.
Birds that cannnot fly?
penguins cant fly, and chickens cant propperly fly!
Why can some birds fly and some cant?
some birds are to big for their wings to make them fly
What birds have 7 letters and cant fly?
Penguin
What can hummingbirds do that most other birds cant?
Fly backwards
What are the differences between birds that can fly and birds that can?
well, a bird that cant fly has a larger body mass than one that can
Can birds fly with oil on there wings?
no they cant fly because it weighs down their wings
True or flase birds use wings and feathers to fly so all birds can fly?
To say that birds use wings and feathers to fly, so all birds can fly, would be false. Not all birds can fly. An ostrich is an example of a bird that cannot fly.
Yes birds can fly?
Most birds can fly. Not all.
Can pigeons fly backward?
Yes they do. Nearly all birds can walk. (Some birds that spend a lot of time on water find it difficult. Some, like Swifts, stay in the air.)
How do birds fly all the way to south?
Birds do not fly all the way to the southern hemisphere, they fly to the equator.
Do carnail the birds fly?
all birds fly xept penguins
A bird that cant fly and is black and white?
well there are all types of birds that can not fly for example the penguin well we all know that
