<P> Captive breeding, or ex-situ conservation, has been used in a number of instances to save species from extinction . The principle is to create a viable population of a species in either zoos or breeding facilities, for later reintroduction back into to the wild . As such a captive population can either serve as an insurance against the species going extinct in the wild or as a last - ditch effort in situations where conservation in the wild is impossible . Captive breeding has been used to save several species from extinction, the most famous example being the California condor, a species that declined to less than thirty birds . In order to save the California condor the decision was made to take every individual left in the wild into captivity . From these 22 individuals a breeding programme began that brought the numbers up to 273 by 2005 . An even more impressive recovery was that of the Mauritius kestrel, which by 1974 had dropped to only four individuals, yet by 2006 the population was 800 . </P> <P> Reintroductions of captive bred populations can occur to replenish wild populations of an endangered species, to create new populations or to restore a species after it has become extinct in the wild . Reintroductions helped bring the wild populations of Hawaiian geese (nene) from 30 birds to over 500 . The Mauritius kestrel was successfully reintroduced into the wild after its captive breeding programme . Reintroductions can be very difficult and often fail if insufficient preparations are made, as species born in captivity may lack the skills and knowledge needed for life in the wild after living in captivity . Reintroductions can also fail if the causes of a birds decline have not been adequately addressed . Attempts to reintroduce the Bali starling into the wild failed due to continued poaching of reintroduced birds . </P> <P> The introduction of captives of unknown pedigree can pose a threat to native populations . Domestic fowl have threatened endemic species such as Gallus g . bankiva while pheasants such as the ring - necked pheasant and captive cheer pheasants of uncertain origin have escaped into the wild or have been intentionally introduced . Green peafowl of similar mixed origins confiscated from local bird dealers have been released into areas with native wild birds . </P> <P> Translocations involve moving populations of threatened species into areas of suitable habitat currently unused by the species . There are several reasons for doing this; the creation of secondary populations that act as an insurance against disaster, or in many cases threats faced by the original population in its current location . One famous translocation was of the kakapo of New Zealand . These large flightless parrots were unable to cope with introduced predators in their remaining habitat on Stewart Island, so were moved to smaller offshore islands that had been cleared of predators . From there a recovery programme has managed to maintain and eventually increase their numbers . </P>

How to save birds from extinction in hindi