A species who cannot adapt to its environment, cannot survive. Adaptations have kept species from being extinct. Adaptations can include, changes in diet, development of protection such as fur coats against temperature, and even skin color changes to act as camouflage from predators.
Competition, new predators , and loss of habitate are environmental pressure that can limite the growth of population and could lead to extinct.
Animals go on extinction when they are continuously hunted by human beings,face risk of the environment and inability to reproduce well or insecurity of their young ones as in the case of reptiles, fishes and amphibians.
Is extinction the word you're looking for ?
inability to reproduce
Actuallly, because of their isolated habitats, island species are more vulnerable to extinction. Introduced species,such as cats, mongoose, and others have led to the extinction of many birds especially, because of their inability to understand the tactics of the alien predator.
because of the habitat!
extinction of species
During: Lots of screaming. After: Much, much less screaming.
Both involve at least a few species dying out because of failure to adapt to the changing environment.
Species can change is there is a mass extinction or if the type of species changed the type of climate or terrain which would would make the species evolve to its new environment so that it can survive.
Well... we can say that the lack of evolution or evolutionary development can certainly aid extinction. If the environment changes too quickly in a direction that is harmful to a species, then the species needs to either evolve or become extinct.
Their bodies aren't adapted to the new environment yet.
Extinction of any species is caused by either the complete loss of all indivduals of the species, by the inability of the remaining individuals to successfully reproduce or by a reduced genepool that is not diverse enough for the species to survive long term or outside of controlled captivity. While some species have been brought back from the brink of extinction most of these species will not survive long term due to a diminished gene pool that cannot adapt to change. (logged out during edit again).