Condor

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Condors
Immature California Condor
Immature California Condor
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Ciconiiformes
Family: Cathartidae
Genus: Vultur
Gymnogyps
Lesson, 1842
Vultur gryphus
Linnaeus, 1758
Gymnogyps californianus
( Shaw, 1797)

Condor is the name for two species of bird in one of the vulture families. They are the largest flying land birds in the Western Hemisphere.

The Andean Condor (Vultur gryphus) inhabits the Andes mountains. The California Condor (Gymnogyps californianus) inhabits the western coast of the United States. Although they are primarily scavengers, feeding on carrion, these species belong to the New World vulture family Cathartidae, related to storks and not closely related to Old World vultures, which are in the family Accipitridae along with hawks, eagles and kites.

Appearance

"By weight, the California Condor rivals the Andean Condor for the designation as the largest of all the species of condor." [1] "California Condors can reach wingspans of 2.8 m (over 9 ft) and can weigh up to 8.5 kg (18.7 lbs), making them the largest North American bird." [2]

An Andean condor soars over southern Peru's Colca Canyon
An Andean condor soars over southern Peru's Colca Canyon

The adult plumage is of a uniform black, with the exception of a frill of white feathers nearly surrounding the base of the neck and, especially in the male, large patches or bands of white on the wings which do not appear until the completion of the first moulting. As an adaptation for hygiene, the head and neck have few feathers (see below photo), exposing the skin to the sterilizing effects of dehydration and ultraviolet light at high altitudes, and are meticulously kept clean by the bird. The head, which is much flattened above, is in the male 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.

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.

California Condor's head (adult)
California Condor's head (adult)

Behavior

Sexual maturity and breeding behaviour 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 Andean condor prefers roosting and breeding at elevations of 3,000 to 5,000 m (10,000–16,000 ft). There on inaccessible ledges of rock, its nest consisting merely of a few sticks placed around the eggs, it deposits one or two bluish-white eggs, weighing about 10 ounces (280 g) and from 3 to 4 inches (75 to 100 mm) in length, during the months of February and March every second year. The egg hatches after 54–58 days of incubation by both parents. If the chick or egg is lost or removed, another egg is laid to take its place. Researchers and breeders take advantage of this behaviour to double the reproductive rate by taking the first egg away for hand-rearing, causing the parents to lay a second egg which they are generally allowed to raise.

California Condor in flight
California Condor in flight

The young are covered with a whitish down until 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, with competition to determine a 'pecking order' by body language, competitive play behaviour, and a wide variety of vocalizations, even though the condor has no voice box.

On wing the movements of the condor, as it wheels in majestic circles, are remarkably graceful. The lack of a large sternum to anchor correspondingly large flight muscles identifies them physiologically as primarily soarers. The birds flap their wings on rising from the ground, but after attaining a moderate elevation they seem to sail on the air. Charles Darwin commented on having watched them for half an hour without once observing a flap of their wings. They prefer to roost on high places from where they can launch without major wing-flapping effort.

Wild condors inhabit large territories, often traveling 150 miles (250 km) a day in search of carrion. They prefer large carcasses such as deer or cattle which they spot by looking for other scavengers, who 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 pounds at once, sometimes to the point of being unable to lift off the ground.

California Condor
California Condor

Humans

Condors are the national bird of Bolivia, Colombia, Chile and Peru and play important roles in the folklore and mythology of South America, similar to the role the Bald Eagle plays in North America. In Peru, Daniel Alomía Robles, composed one of the most known Peruvian songs: El Cóndor Pasa.

Andean Condors, depicted in the 1851 Illustrated London Reading Book
Andean Condors, depicted in the 1851 Illustrated London Reading Book

Humans have done significant damage to the condor population. Their low birth rate, late age of sexual maturity, and tendency to mate for life all make them vulnerable to loss of population. The California Condor is in danger of extinction; by 1986, only 21 individuals were left alive, all in captivity ( 2002 population stands at about 200) [3]. Significant damage to the condor population is attributed to hunting, lead poisoning (from eating animals containing lead shot), DDT poisoning, and habitat destruction. Beginning in the 1980s, a captive breeding program was undertaken to try to restore the species. Condors were released in 1991 and 1992 in California, and again in 1996 in Arizona near the Utah border. As well, the Condors were reintroduced into the wild in the Grand Canyon national park. Their numbers are increasing steadily, particularly in the South Rim of the Canyon, where tourists may view these creatures. Unanticipated deaths among these populations occurred due to contact with power lines and other factors. In 2003 the first bird fledged in the wild since 1981.

The Andean Condor is becoming more common in bird shows, these large birds can prove very powerful and aggressive so a well-trained Andean Condor appearing free in a public show is an impressive feat.

An image of the California Condor, along with John Muir and Half Dome, appears on the California State quarter that has been released in January 2005.

See Sibley-Ahlquist taxonomy for an alternative bird of prey classification.

California Condor appears on the California quarter
California Condor appears on the California quarter