answersLogoWhite

0

because there wings get frail and weak and they cant hold them selfs up anymore

User Avatar

Wiki User

17y ago

What else can I help you with?

Related Questions

How did the dodo bird differ from birds of today?

Dodos are a flightless bird that is related to species common today like pigeons and doves. It had evolved from flying ancestors and lost the ability to fly. Aside from that it was the same as the majority of modern birds. Flightlessness is not unknown in modern birds (penguin, emus, rheas, ostriches) so this is not a unique trait.


Do birds develop externally or internally?

Birds develop internally, which means inside the creatures body.


How did placental mammals develop from birds?

They did not. Mammals evolved independently of birds.


Where does the placenta develop from birds?

in the egg


What animal were the first to develop four limbs?

Birds


Why are the birds mostly flightless in the savanna grassland?

Birds in savanna grasslands are often flightless due to evolutionary adaptations that favor ground-based living. These environments provide ample food sources and nesting opportunities on the ground, reducing the need for flight. Additionally, the open terrain may favor birds that can run quickly to evade predators rather than relying on flight for escape. Flightlessness can also be a result of reduced predation pressure, allowing these birds to thrive without the need for flying.


How do birds develop their youngs?

Birds look after their young in their nests until they are old enough to leave their nest and fend for themselves.


What characteristic of the Galapagos Islands would allow the birds to develop into different species?

The geographic isolation of the birds on separate islands. By: Yoshi


Why do birds turn there eggs periodically?

so that their baby's will develop properly , if your told its to keep them warm its wrong , ( birds sit on the eggs to keep them warm).


Did jaws develop independantly in mammals and birds?

No. Both mammals and birds "inherited jaws" from a common reptilian ancestor which ultimately originated in an early fish.


is there any flightless bats?

Yes, there are species of bats that exhibit flightlessness, although they are extremely rare. One notable example is the extinct Giant Golden-Crowned Flying Fox (Acerodon jubatus), which was unable to fly due to its size and habitat adaptations. However, most bats are capable of flight, as it is a key characteristic of the order Chiroptera. Flightlessness in bats is not a common evolutionary trait.


What organisms have amniotic cells?

anything that has young that develop in an amniotic sack: reptiles, birds, and mammals