The maned wolf (Chrysocyon brachyurus) is the largest canid of South America and the sole member of the genus Chrysocyon. It inhabits the open grasslands, savannas, and scrubby woodland of Brazil, Paraguay, northern Argentina, Bolivia, and Uruguay, preferring areas with scattered trees and minimal human disturbance. Its striking appearance includes a reddish‑brown coat, a black mane that runs from the neck to the tail, and exceptionally long, slender legs that give it a stilt‑like gait. Adults stand 75–90 cm at the shoulder and measure 100–130 cm from head to the base of the tail. Unlike true wolves, the maned wolf is largely solitary, with individuals maintaining territories of up to 30 km². It is classified as Near Threatened by the IUCN, with an estimated 50,000–70,000 mature individuals remaining. Primary threats include habitat conversion to agriculture, road mortality, and disease transmission from domestic dogs. Conservation actions focus on protecting large tracts of native cerrado and pampas, establishing wildlife corridors, and promoting community‑based monitoring programs.

The maned wolf is primarily crepuscular, becoming most active at dawn and dusk, though it can also be seen feeding during the night in areas with low human presence. It is a solitary hunter; males and females maintain separate, overlapping home ranges that are marked with scent glands, urine, and feces. Vocal communication is limited to a distinctive, high‑pitched bark‑like howl known as the “roar of the maned wolf,” which can travel up to 2 km and is used to announce presence or deter rivals. In addition, individuals exchange scent marks and occasional visual signals such as tail raising. Territorial boundaries are defended through brief chases and aggressive posturing rather than prolonged fights. Social interactions are most evident during the breeding season, when a male may temporarily associate with a receptive female. Outside of reproduction, the species shows little cooperative behavior, and offspring become independent after 6–9 months.

The maned wolf is an omnivore with a strong preference for plant material, especially the fruit of the “wolf apple” (Solanum lycocarpum), which can constitute up to 50 % of its diet during the dry season. It also consumes a variety of small mammals such as rodents, lagomorphs, and armadillos, as well as birds, reptiles, insects, and carrion. Seasonal fluctuations dictate food intake: in the wet season, protein‑rich prey becomes more available, while in the dry season the wolf relies heavily on fruits and tubers. An adult requires roughly 1.5–2 kg of food per day, obtained through solitary, opportunistic hunting and extensive roaming. Feeding strategies include stalking prey in tall grass, digging for burrowing rodents, and scavenging carcasses left by larger predators. The species’ flexible diet allows it to persist in fragmented habitats, but dependence on the wolf apple ties its distribution closely to cerrado ecosystems.

Maned wolves reach sexual maturity at about 2 years for females and 3 years for males. Breeding occurs once a year, typically between May and August, timed so that pups are born during the rainy season when prey is abundant. After a gestation period of 60–65 days, the female gives birth to a litter of 2–6 pups, most commonly three. The young are born blind and weigh around 250 g. The mother alone cares for the litter, nursing them for the first 8–10 weeks while they remain hidden in dense vegetation. By three months, pups begin to accompany the mother on short foraging trips, and they are weaned completely by 4–5 months. Dispersal occurs at 6–9 months, when juveniles leave the natal area to establish their own territories. Males may assist in defending the den site, but parental care is solely maternal.

The IUCN classifies the maned wolf as Near Threatened, with the global population estimated at 50,000–70,000 mature individuals and a declining trend. Habitat loss is the most significant threat; conversion of the Brazilian cerrado and pampas to soy agriculture, cattle ranching, and urban expansion fragments the wolf’s range and reduces prey availability. Road mortality is high, with an estimated 5–10 % of individuals killed annually on major highways. Disease transmission from domestic dogs, particularly canine distemper and rabies, causes periodic die‑offs in local populations. Additionally, persecution by farmers—who sometimes view the wolf as a competitor for livestock—leads to illegal hunting. Conservation measures include the establishment of protected areas such as the Serra da Canastra National Park, creation of ecological corridors, vaccination campaigns for domestic dogs, and community outreach programs that promote coexistence and sustainable land‑use practices.

• The maned wolf’s long legs are an adaptation for moving through tall grasses, giving it a height of up to 90 cm at the shoulder.
• Its most important food source, the wolf apple (Solanum lycocarpum), provides up to half of its caloric intake during the dry season.
• Unlike true wolves, maned wolves are largely solitary and only form temporary pairs during the breeding season.
• The species emits a unique “roar” that can travel up to 2 km, used mainly for territorial advertisement.
• Genetic studies show that the maned wolf diverged from other canids about 4–5 million years ago, making it a distinct evolutionary lineage.