Government Proposes First Take Permit for Condor Deaths at a Wind Farm
As endangered California Condors recover, they are veering toward wind turbines. The U.S. Fish and Wildlife Service is preparing for the inevitable.
Adult. Photo: Loi Nguyen/Audubon Photography Awards
Gymnogyps californianus
Conservation status | Decline in numbers was already evident to observers by 1890. Early causes included shooting; also, many condors died in traps or at poisoned carcasses put out to kill large predators. In more recent years, poisoning (including lead poisoning), shooting, and collisions with power lines were among causes of death. Numbers remaining were estimated at about 60 in 1965, fewer than 25 in 1982. In mid-1980s, all remaining wild condors were caught for captive breeding. This breeding program succeeded quite well in raising the numbers of captives, suggesting that it might be possible to reestablish a wild population again. By the mid-1990s, attempts were being made to introduce some of the captive-bred condors into the wild. |
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Family | New World Vultures |
Habitat | Wild open country, rugged hills. At one time, ranged over much of the west, from mountains and valleys to the coast. On its last stand in California, the condor foraged over open grassland and savannah, and nested in rugged mountainous terrain with forest and steep cliffs. |
Generally forages only in warmer hours of day, spending morning and evening perched at night roost. Forages by soaring, often less than 2000' above ground, looking for carrion. May find much of its food by watching actions of other scavengers (such as vultures or ravens).
One. Whitish. Incubation is by both sexes, about 56 days. Members of pair trade places on the egg once every 1-5 days, rarely taking shifts up to 9-10 days. Young: Both parents bring food for young bird. Adult condors harass or chase away potential predators, such as ravens, Golden Eagles, and large mammals, from vicinity of nest. Young capable of flight about 5-6 months after hatching, may remain dependent on parents for at least another 6 months. This long period of dependence means that the whole nesting cycle takes more than a year, so after successfully raising one young the condors must skip one nesting season before trying again.
Both parents bring food for young bird. Adult condors harass or chase away potential predators, such as ravens, Golden Eagles, and large mammals, from vicinity of nest. Young capable of flight about 5-6 months after hatching, may remain dependent on parents for at least another 6 months. This long period of dependence means that the whole nesting cycle takes more than a year, so after successfully raising one young the condors must skip one nesting season before trying again.
Carrion. Prefers recently-dead large animals, such as deer or cattle. Formerly occurred often on coast, feeding on dead whales and other marine creatures washed up on beach.
Apparently does not breed in the wild until about 7 years old. Nest site is usually in cave or large crevice in cliff; sometimes in crevice among large rocks on steep slope, or in burned-out cavity in huge tree, such as giant sequoia. On flat bottom of cave, adult condors may make "nest" of stones, debris, gravel.
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