The maned wolf is the largest canid in South America and one of the most distinctive, with a reddish-golden coat, long black stockings, and strikingly elongated legs that lend it the nickname "fox on stilts." Despite its name, it is neither a true wolf nor a fox but the sole living member of its genus, Chrysocyon [IUCN 2015]. A shy, mostly solitary inhabitant of open grasslands and savannas, it plays an important ecological role as a seed disperser across central South America [Smithsonian 2024].
Biology and Identification
Adult maned wolves stand roughly 90 cm (about 3 ft) at the shoulder and weigh around 23 kg (about 50 lb), making them by far the tallest wild canid of the continent [Smithsonian 2024]. The species is named for the dark, erectile mane along the neck and shoulders, which can rise when the animal is alarmed [Canid Specialist Group 2024]. The maned wolf is omnivorous and remarkably reliant on plant matter: fruit—especially the tomato-like "wolf apple" or lobeira (Solanum lycocarpum)—can make up roughly half of the diet, complemented by small mammals, birds, reptiles, and insects [Smithsonian 2024]. It is largely solitary, with monogamous pairs sharing a territory but typically foraging alone, and it communicates over long distances with a far-carrying "roar-bark" rather than howling [Smithsonian 2024]. Because so much fruit passes through it, the maned wolf acts as an effective seed disperser within the grasslands and savanna mosaics it inhabits [Smithsonian 2024].
Habitat and Range
The maned wolf is an animal of open and semi-open landscapes—grasslands, scrub, and the savanna mosaics of the South American Cerrado—rather than dense forest [IUCN 2015]. Its range spans central and eastern Brazil, northern and eastern Bolivia, Paraguay, central and north-eastern Argentina, and parts of south-eastern Peru, with only a few scattered records remaining at its southern limits in Uruguay and southern Brazil [Queirolo et al. 2011]. Brazil holds the overwhelming majority of the global population, and the Cerrado biome is the species' core stronghold [IUCN 2015].
Conservation Status
The maned wolf is listed as Near Threatened on the IUCN Red List, assessed in 2015 [IUCN 2015]. The global population is estimated at approximately 17,000 mature individuals, with more than 90% occurring in Brazil, and the overall population trend is assessed as decreasing [IUCN 2015]. The species also carries stronger national and international protective listings: it is listed under the U.S. Endangered Species Act as Endangered [USFWS 2024], and it is included in Appendix II of the Convention on International Trade in Endangered Species (CITES), which regulates international trade in the species [CITES 1975].
Threats
The principal threat to the maned wolf is the loss and fragmentation of its Cerrado habitat, driven by the conversion of native grasslands and savanna to cropland, pasture, and cattle ranching, as well as urban expansion [IUCN 2015]. As habitat is broken up by agriculture and infrastructure, road networks expand through and around remaining range, and vehicle collisions (roadkill) on highways are a significant and well-documented source of mortality, with several individuals killed per year in some regions of central Brazil [Canid Specialist Group 2024]. Additional pressures include persecution near farmland, predation and competition involving domestic dogs, and the transmission of pathogens such as canine distemper, parvovirus, and others from domestic dogs to wild maned wolves [Canid Specialist Group 2024]. The small size and isolation of many protected areas further limit their ability to sustain viable, genetically connected populations [Coelho et al. 2014].
What Is Being Done
The maned wolf benefits from a combination of field research, protected-area management, and coordinated breeding programs. In Brazil, organizations such as the Instituto Pró-Carnívoros conduct long-term ecological and conservation research on the species, including work based at Cerrado reserves such as the Águas Emendadas Ecological Station [Pró-Carnívoros 2024]. Genetic and population studies using non-invasive methods—such as fecal DNA analysis to estimate minimum population size and diversity in protected areas—help managers understand how isolated populations are faring [Coelho et al. 2014]. National action plans in Brazil and Argentina, vaccination campaigns for domestic dogs near wildlife areas, and public-awareness efforts address documented threats, while coordinated ex-situ breeding and species-survival planning maintain a managed captive population [Canid Specialist Group 2024]. The IUCN/SSC Canid Specialist Group compiles and disseminates the science that underpins these efforts [Canid Specialist Group 2024].
How You Can Help
The most effective way to support maned wolf recovery is to back credible, science-based organizations working in the Cerrado and on canid conservation—such as the IUCN/SSC Canid Specialist Group and established Brazilian research institutes—and to support the protection and connectivity of remaining Cerrado habitat [Canid Specialist Group 2024; Pró-Carnívoros 2024]. Travelers and residents in range countries can contribute by reporting wildlife sightings and roadkill to legitimate citizen-science and wildlife-monitoring programs, which helps researchers map populations and identify dangerous road segments [IUCN 2015]. More broadly, informed advocacy for responsible land-use planning, and for keeping domestic dogs vaccinated and controlled near wildlife areas, helps reduce two documented threats—habitat fragmentation and disease transmission [Canid Specialist Group 2024].
References
[IUCN 2015] Paula, R.C. & DeMatteo, K. (2015). Chrysocyon brachyurus (Maned Wolf). The IUCN Red List of Threatened Species 2015: e.T4819A88135664. https://www.iucnredlist.org/species/4819/88135664
[Canid Specialist Group 2024] IUCN/SSC Canid Specialist Group. Maned wolf (Chrysocyon brachyurus) species account. https://www.canids.org/species/view/PREKGA855611
[USFWS 2024] U.S. Fish & Wildlife Service. Species Profile: Maned wolf (Chrysocyon brachyurus). ECOS Environmental Conservation Online System. https://ecos.fws.gov/ecp/species/4246
[CITES 1975] Convention on International Trade in Endangered Species of Wild Fauna and Flora. Chrysocyon brachyurus, Appendix II. https://cites.org/eng/gallery/species/mammal/maned_wolf.html
[Smithsonian 2024] Smithsonian's National Zoo and Conservation Biology Institute. Maned wolf. https://nationalzoo.si.edu/animals/maned-wolf
[Coelho et al. 2014] Coelho, C.M., et al. (2014). Maned wolf (Chrysocyon brachyurus) minimum population size and genetic diversity in a Cerrado protected area of southeastern Brazil revealed by fecal DNA analysis. Mammalia. https://doi.org/10.1515/mammalia-2013-0109
[Queirolo et al. 2011] Queirolo, D., et al. (2011). Historical and current range of the Near Threatened maned wolf Chrysocyon brachyurus in South America. Oryx, 45(2), 296–303. https://doi.org/10.1017/S0030605310000372
[Pró-Carnívoros 2024] Instituto Pró-Carnívoros. Biology and conservation of the maned wolf in the Águas Emendadas Ecological Station. https://procarnivoros.org.br/en/projeto/biology-and-conservation-of-the-maned-wolf-in-the-aguas-emendadas-ecological-station/