Maned Wolf

About the maned wolf

The maned wolf is the largest canine native to South America, though despite its name and fox-like coloring, it is neither a wolf nor a fox — it is the only species in its genus, Chrysocyon, a name that comes from the Greek for "golden dog." It stands apart from other large canids in a very literal way: its legs are disproportionately long relative to its body, probably an adaptation to the tall grasslands of its native habitat. An adult typically weighs 20 to 30 kg (44 to 66 lb) and stands up to 110 cm (43 in) at the withers, with an average weight closer to 23 kg (51 lb). Head-and-body length runs about 100 cm (39 in), with the tail adding another 45 cm (18 in), and the large, upright ears measure around 18 cm (7.1 in).

Its coat is reddish-brown to golden-orange along the body, set off by black legs and a distinctive black mane running down the back of the neck — the feature that gives the species its common name. A white tuft marks the tip of the tail, and a white "bib" sits beneath the throat. The mane is erectile, and the animal raises it to look larger when threatened or displaying aggression. Genetic and fossil evidence suggests the maned wolf is the only large South American canid to have survived the extinction event at the end of the Pleistocene; its closest living relative is the bush dog, and it is only distantly related to canines found outside South America.

In the wild, the maned wolf occupies the Cerrado — the vast savanna of south, central-west, and southeastern Brazil — as well as similar open and semi-open habitat in Paraguay, northern Argentina, and Bolivia. It also has a small presence in far southeastern Peru's Pampas del Heath, and it is now very rare in Uruguay, likely displaced by habitat loss. Young pups start out with darker fur than adults, gradually taking on the bronze coloring of grown wolves.

Behavior and diet

The maned wolf is a solitary animal that does not form packs, setting it apart from most other large canids such as the gray wolf or the African hunting dog. Its activity is described as crepuscular, with peak movement between roughly 8 and 10 in the morning and 8 and 10 at night, though on cool or cloudy days it can be active throughout the day. It hunts alone, typically between sundown and midnight, using its large ears to listen for prey moving through the grass, then tapping the ground with a front foot to flush the animal out before pouncing. Communication happens largely through scent marking with a strongly odored urine — often compared to the smell of cannabis — along with a loud vocalization known as a "roar-bark." Monogamous pairs share a territory of around 30 km2 (12 sq mi) crisscrossed with patrol paths, though outside the mating season the pair may meet only rarely.

The species is omnivorous, and unusually for a canine, plant matter makes up the largest share of its diet. The wolf apple, a tomato-like fruit, alone accounts for 40 to 90% of what a maned wolf eats in most areas, and researchers have recorded up to 301 different food items in the species' diet overall, including 116 plant species and 178 animal species. On the animal side, it takes rodents, rabbits, birds and their eggs, reptiles, fish, insects, and other invertebrates, hunting successfully in roughly 21% of attempts and sometimes scavenging carcasses.

Breeding runs from November through April, with gestation lasting 60 to 65 days and litters of two to six pups, each weighing around 340 to 430 g (12 to 15 oz) at birth. Pups are born with black fur that turns red after about ten weeks, and their eyes open around nine days of age. They nurse for up to four months and are also fed by regurgitation from around three weeks old until roughly ten months, reaching full growth by one year old, when they leave their birth territory and reach sexual maturity. Both parents take part in raising pups, though females do most of the direct care. Longevity in the wild is not established, but captive maned wolves typically live 12 to 15 years, and one individual at the São Paulo Zoo reached 22 years old.

Range and habitat

The maned wolf's native range spans Argentina, Brazil, Bolivia, Peru, and Paraguay, including the Cerrado savanna of south, central-west, and southeastern Brazil. It favors open and semi-open habitat — grasslands with scattered trees and shrubs, scrub prairies, and forest edges — and shows enough ecological flexibility to survive in disturbed landscapes, including areas that have been burned, where it can still find small mammal prey. It is nearly extinct in Uruguay, likely as a result of habitat loss there, though it remains present, if rare, across the rest of its range.

Conservation status

The IUCN lists the maned wolf as Near Threatened, while Brazil's own environmental agency classifies it as vulnerable. One notable moment in the species' conservation history came in 2011, when a female maned wolf injured by a truck received stem cell treatment at the Brasília Zoo — the first documented use of stem cells to treat an injury in a wild animal. The species also faces disease risk from its overlap with domestic dogs, picking up illnesses such as rabies, canine distemper, and parvovirus where their ranges intersect, along with parasites including ticks and the giant kidney worm.