Condor is the common name for two species of New World vultures, each in a monotypic genus. The name derives from the Quechua kuntur.[1][2] They are the largest flying land birds in the Western Hemisphere.
One species, the Andean condor (Vultur gryphus), inhabits the Andean mountains. The other, the California condor (Gymnogyps californianus), is currently restricted to the western coastal mountains of the contiguous United States and Mexico, as well as the northern desert mountains of Arizona.
Condors are part of the family Cathartidae, which contains the New World vultures, whereas the 15 species of Old World vultures are in the family Accipitridae, which also includes hawks, eagles, and kites. The New World and Old World vultures evolved from different ancestors. They both are carrion-eaters and the two groups are similar in appearance due to convergent evolution.
The adult plumage is uniformly black, with the exception of a frill of white feathers nearly surrounding the base of the neck which are meticulously kept clean by the bird. As an adaptation for hygiene, the condor's head and neck have few feathers, which exposes the skin to the sterilizing effects of dehydration and solar ultraviolet light at high altitudes. The head is much flattened above. In the male it is crowned with a caruncle or comb, while the skin of the neck in the male lies in folds, forming a wattle. The skin of the head and neck is capable of flushing noticeably in response to emotional state, which serves to communicate between individuals.[4]
The middle toe is greatly elongated, and the hinder one but slightly developed, while the talons of all the toes are comparatively straight and blunt. The feet are thus more adapted to walking as in their relatives the storks,and of little use as weapons or organs of prehension as in birds of prey and Old World vultures. The female, contrary to the usual rule among birds of prey, is smaller than the male.[4]
Fossils of both extinct and extant condor species from the Pleistocene era have been found in various parts of North America, including New York and Florida, leading scientists to hypothesize that California condors (as well as their ancestors and relatives) once lived on the west coast of North America as well as all the way to the eastern coast, until their eventual extinction/extirpation. Some scientists also have found that an ancient relative of the condor, Argentavis magnificens from South America, may have been the largest flying bird ever with a wingspan of 7 metres (23 ft).[8]
Sexual maturity and breeding behavior do not appear in the condor until 5 or 6 years of age. They may live for 50 years or more, and mate for life. The world's oldest condor died at 100 in the Jardin d'Essai du Hamma in Algiers.[9]
The young are covered with a grayish down until they are almost as large as their parents. They are able to fly after six months, but continue to roost and hunt with their parents until age two, when they are displaced by a new clutch. There is a well-developed social structure within large groups of condors; a recent study showed the 'pecking order' is determined by age group and, within age groups, by sex (which contradicts previous findings).[10][11]
The lack of a large sternum to anchor correspondingly large flight muscles identifies it physiologically as a primary soarer. The birds flap their wings on rising from the ground, but after attaining a moderate elevation they seem to sail on the air, transiting from one upstream to the next often without flapping their wings. One Andean condor was recording maintaining such flight for 171 kilometers (106 mi), for over five hours.[12]
Wild condors inhabit large territories, often traveling 250 km (160 mi) a day in search of carrion. They prefer large carcasses such as deer or cattle which they spot by looking for other scavengers, which cannot rip through the tougher hides of these larger animals with the efficiency of the larger condor. In the wild they are intermittent eaters, often going for a few days without eating, then gorging themselves on several kilograms (pounds) at once, sometimes to the point of being unable to lift off the ground.[citation needed]
The California condor (Gymnogyps californianus), with a wingspan of 9.5 feet and weighing up to 25 pounds, is the largest land bird in North America. These majestic creatures historically ranged from California to Florida and Western Canada to Northern Mexico. By the mid-20th century, condor populations had dropped dramatically, and by 1967 the California condor was listed as endangered by the federal government. In 1982, only 23 condors survived world-wide. By 1987, all remaining wild condors were placed into a captive breeding program in an effort to save the species from extinction.
Since 1992, when the U.S. Fish and Wildlife Service (USFWS) began reintroducing captive-bred condors to the wild, the USFWS and its public and private partners have grown the total free-flying and captive population to more than 500 condors In 2004, the Recovery program reached an important milestone with the first successful chick hatched in the wild. In 2008, more California condors flying free in the wild than in captivity for the first time since the program began.
The California Condor Recovery Program (Recovery Program) is an international multi-entity effort, led by the USFWS, to recover the endangered California condor. Partners in condor recovery include the Peregrine Fund, Ventana Wildlife Society, National Park Service, San Diego Zoo, Los Angeles Zoo, Oregon Zoo, Santa Barbara Zoo, Chapultepec Zoo, Arizona Game and Fish Department, California Department of Fish and Wildlife, Utah Division of Wildlife Resources, Bureau of Land Management, U.S. Forest Service, the federal government of Mexico, the Yurok Tribe, and a host of other governmental and non-governmental organizations.
Use non-lead ammunition for hunting and/or dispatch of livestock. Lead ammunition fragments upon impact and, if consumed by a scavenger such as a condor, can result in lead poisoning, which is the number one known cause of death in California condors.
Pick up microtrash, or small bits of trash such as broken glass, bottle caps, can tabs and other smaller, broken-down pieces of trash that can be ingested by condors. Condors can ingest small items around homes and feed them to their chicks which can cause starvation, stunted growth and death.
If you live in condor country, and condors are landing or causing damage to your property, spray water, yell, clap, and make loud noises to scare them away, or install a motion-activated scarecrow animal deterrent.
Condors are curious, and as they explore their environment, they may become entangled in loose wires, or tear at other materials with their beaks. Remove or prevent access to things that may attract condors, like open trash and recyclable containers, wires, seat cushions and drinkable water resources.
Males and females are similar in appearance. Adult condors have a mostly bald head and neck. The skin of the head and neck is colored in shades of pink, red, orange, yellow, and light blue, and becomes more intensely pinkish orange during times of excitement and during the breeding season. Feathers are mostly black except for white underwing linings. Juvenile birds have dusky black feathered heads and bodies with limited white underwing linings. At hatch, chicks have light pink and orange skin and are covered in off-white down which is quickly replaced by gray down.
California condors use vast expanses of varying habitats for foraging, roosting, and nesting. Condors roost on large trees or snags, or on rocky outcrops and cliffs. Nests are located in caves and ledges of steep rocky terrain or in cavities and broken tops of old growth conifers created by fire or wind. Foraging habitat includes open grasslands, oak savanna foothills, and beaches adjacent to coastal mountains. With the right air conditions, condors are known to fly up to 250 miles a day across mountainous terrain in search of food.
Condors do not kill for food; they are carrion eaters and feed on the carcasses of mammals including deer, marine mammals such as whales and seals, and cattle. A condor may eat up to 3 to 4 pounds of carrion at a time and may not need to feed again for several days. Condors find their food by sight or by following other scavenging birds. Condors normally feed in a group where a strict dominance hierarchy is followed. Dominant birds usually eat first and take the choicest parts of the carcass.
The condor's beak is long, sharp, and powerful. It can pierce the hide of a horse. Condors use their beaks to tear the flesh from carcasses, and to touch, feel, and explore their surroundings. Condors have been observed using their beak to remove foliage from trees to create better roosting sites and manipulating rocks and other objects in caves to improve the nesting area.
Condors are fastidious birds; after eating they bathe in ponds or pools and will spend many hours preening and drying their feathers. If no water is available, they will clean their heads and necks by rubbing them on grass, rocks, or tree branches.
Condors spend most of their time perched, sunning and preening. Condors roost where they can easily launch themselves into flight with just a few wing beats. Roost sites include large trees, snags, cliffs, and rocky outcrops. Condors will often roost in groups and will return to the same roost sites year after year. Dominant birds often take the choice position in a group roost.
California condors can soar on warm thermal updrafts for hours, reaching speeds of more than 55 miles per hour and altitudes of 15,000 feet. Flights in excess of 250 miles in a day have been recorded. Condors hold their wings in a horizontal position and fly very steadily, unlike turkey vultures which fly with their wings held in a V-shape and appear to be unsteady or "wobbly."
Condors are highly intelligent, social birds. They are inquisitive and often engage in play, especially immature birds. They will entertain themselves at length with feathers, sticks, and grass, often playing tug-of-war, and tossing, chasing, and retrieving the objects. This activity is especially pronounced around water holes.
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