The bush dog (''Speothos venaticus'') is a canine found in

Central Central is an adjective usually referring to being in the center of some place or (mathematical) object. Central may also refer to: Directions and generalised locations * Central Africa, a region in the centre of Africa continent, also known as ...

and

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...

. In spite of its extensive range, it is very rare in most areas except in

Suriname Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic coast of South America. It is bordered by the Atlantic Ocean to the north ...

Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the ...

and

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

; it was first identified by

Peter Wilhelm Lund Peter Wilhelm Lund (14 June 1801 – 25 May 1880) was a Danish paleontologist, zoologist, and archeologist. He spent most of his life working and living in Brazil. He is considered the father of Brazilian paleontology as well as archaeology. He ...

from

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

s in

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

ian caves and was believed to be extinct. The bush dog is the only living

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

in the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

''Speothos'', and genetic evidence suggests that its closest living relative is the

maned wolf The maned wolf (''Chrysocyon brachyurus'') is a large canine of South America. It is found in Argentina, Brazil, Bolivia, Peru, and Paraguay, and is almost extinct in Uruguay. Its markings resemble those of foxes, but it is neither a fox nor a w ...

of central South America or the

African wild dog The African wild dog (''Lycaon pictus''), also called the painted dog or Cape hunting dog, is a wild canine which is a native species to sub-Saharan Africa. It is the largest wild canine in Africa, and the only extant member of the genus '' Ly ...

. The species is listed as Near Threatened by the IUCN. In Brazil it is called ''cachorro-vinagre'' ("vinegar dog") or ''cachorro-do-mato'' ("bush dog"). In

Spanish-speaking Hispanophone and Hispanic refers to anything relating to the Spanish language (the Hispanosphere). In a cultural, rather than merely linguistic sense, the notion of "Hispanophone" goes further than the above definition. The Hispanic culture is th ...

countries it is called ''perro vinagre'' ("vinegar dog"), ''zorro vinagre'' ("vinegar fox"), ''perro de agua'' ("water dog"), or ''perro de monte'' ("mountain dog").

Description

Adult bush dogs have soft long brownish-tan fur, with a lighter reddish tinge on the head, neck and back and a bushy tail, while the underside is dark, sometimes with a lighter throat patch. Younger individuals, however, have black fur over their entire bodies. Adults typically have a head-body length of , with a tail. They have a shoulder height of and weigh . They have short legs relative to their body, as well as a short snout and relatively small ears. The teeth are adapted for its carnivorous habits. Uniquely for an American canid, the

dental formula Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, it is the characteristic arrangement, kind, and number of teeth in a given species at a given age. That is, the number, type, and morpho-physiolo ...

is for a total of 38 teeth. The bush dog is one of three canid species (the other two being the

dhole The dhole (''Cuon alpinus''; ) is a canid native to Central, South, East and Southeast Asia. Other English names for the species include Asian wild dog, Asiatic wild dog, Indian wild dog, whistling dog, red dog, red wolf, and mountain wolf. It ...

and the

) with trenchant heel dentition, having a single cusp on the

talonid The molars or molar teeth are large, flat teeth at the back of the mouth. They are more developed in mammals. They are used primarily to grind food during chewing. The name ''molar'' derives from Latin, ''molaris dens'', meaning "millstone ...

of the lower carnassial tooth that increases the cutting blade length. Females have four pairs of

teat A teat is the projection from the mammary glands of mammals from which milk flows or is ejected for the purpose of feeding young. In many mammals the teat projects from the udder. The number of teats varies by mammalian species and often corr ...

s and both sexes have large

scent gland Scent gland are exocrine glands found in most mammals. They produce semi-viscous secretions which contain pheromones and other semiochemical compounds. These odor-messengers indicate information such as status, territorial marking, mood, and s ...

s on either side of the anus. Bush dogs have partially webbed toes, which allow them to swim more efficiently.

Genetics

''Speothos'' has a

diploid Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively ...

chromosome number of 74, and so it is unable to produce fertile hybrids with other canids.

Distribution and habitat

Bush dogs are found from

Costa Rica Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the no ...

in Central America and through much of South America east of the Andes, as far south as central

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

Paraguay Paraguay (; ), officially the Republic of Paraguay ( es, República del Paraguay, links=no; gn, Tavakuairetã Paraguái, links=si), is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to th ...

and southern

. They primarily inhabit lowland forests up to elevation, wet savannas and other habitats near rivers, but may also be found in drier

cerrado The ''Cerrado'' (, ) is a vast ecoregion of tropical savanna in eastern Brazil, particularly in the states of Goiás, Mato Grosso do Sul, Mato Grosso, Tocantins, Minas Gerais, and the Federal District. The core areas of the Cerrado biome are the ...

and open pasture. The historic range of this species may have extended as far north as

where the species may still be found in suitable habitat. New, repeated observations of bush dog groups have been recorded in east-central ( Barbilla National Park) and south-eastern (

La Amistad International Park The La Amistad International Park, or in Spanish , formerly the La Amistad National Park, is a Transboundary Protected Area in Latin America, management of which is shared between Costa Rica ( Caribbean La Amistad and Pacific La Amistad Conservat ...

) Costa Rica, and a substantial portion of the Talamanca Mountains up to 120 km to the north-northwest and at elevations up to 2,119 m. Very recent fossils dating from 300 A.D. to 900 A.D.(the Late Ceramic Age) have been found in the Manzanilla site on the eastern coast of

Trinidad Trinidad is the larger and more populous of the two major islands of Trinidad and Tobago. The island lies off the northeastern coast of Venezuela and sits on the continental shelf of South America. It is often referred to as the southernmos ...

. There are three recognised

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

: * The South American bush dog (''Speothos venaticus venaticus''), with a range including southern

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

and

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

the Guyanas The Guianas, sometimes called by the Spanish loan-word ''Guayanas'' (''Las Guayanas''), is a region in north-eastern South America which includes the following three territories: * French Guiana, an overseas department and region of France * G ...

, most of

, eastern

Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ''Eku ...

and

, Bolivia, and northern Paraguay. * The Panamanian bush dog (''Speothos venaticus panamensis''), with a range including Panama, northern Colombia and Venezuela, western Ecuador. * The southern bush dog (''Speothos venaticus wingei''), with a range including southern Brazil and Paraguay, as well as extreme northeastern

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

. The first camera trap photos of this species in

were obtained in April 2016 from the Selva Paranaense Don Otto Ecological Private Reserve, located in Eldorado Department of the

Misiones Misiones (, ''Missions'') is one of the 23 provinces of Argentina, located in the northeastern corner of the country in the Mesopotamia region. It is surrounded by Paraguay to the northwest, Brazil to the north, east and south, and Corrientes P ...

province of Argentina.

Behavior

Bush dogs are

carnivore A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant whose food and energy requirements derive from animal tissues (mainly muscle, fat and other sof ...

s and hunt during the day. Their typical prey are

paca A paca is a member of the genus ''Cuniculus'' of ground-dwelling, herbivorous rodents in South and Central America. It is the only genus in the family Cuniculidae. Pacas are large rodents with dots and stripes on their sides, short ears, and ...

agouti The agouti (, ) or common agouti is any of several rodent species of the genus ''Dasyprocta''. They are native to Middle America, northern and central South America, and the southern Lesser Antilles. Some species have also been introduced else ...

and capybaras, all large rodents. Although they can hunt alone, bush dogs are usually found in small packs. The dogs can bring down much larger prey, including

peccaries A peccary (also javelina or skunk pig) is a medium-sized, pig-like hoofed mammal of the family Tayassuidae (New World pigs). They are found throughout Central and South America, Trinidad in the Caribbean, and in the southwestern area of North ...

and rheas, and a pack of six dogs has even been reported hunting a

tapir Tapirs ( ) are large, herbivorous mammals belonging to the family Tapiridae. They are similar in shape to a pig, with a short, prehensile nose trunk. Tapirs inhabit jungle and forest regions of South and Central America, with one species inhabit ...

, where they trailed the animal and nipped at its legs until it was felled. When hunting paca, part of the pack chases it on land and part wait for it in the water, where it often retreats. Bush dogs appear to be the most gregarious South American canid species. They use hollow logs and cavities such as

armadillo Armadillos (meaning "little armored ones" in Spanish) are New World placental mammals in the order Cingulata. The Chlamyphoridae and Dasypodidae are the only surviving families in the order, which is part of the superorder Xenarthra, along wi ...

burrows for shelter. Packs consist of a single mated pair and their immediate relations, and have a home range of . Only the adult pair breed, while the other members of the pack are subordinate, and help with rearing and guarding any pups. Packmates keep in contact with frequent whines, perhaps because visibility is poor in the undergrowth where they typically hunt. While eating large prey, parents position themselves at either ends of the animal, making it easier for the pups to disembowel it.

Reproduction

Bush dogs mate throughout the year;

oestrus The estrous cycle (, originally ) is the set of recurring physiological changes that are induced by reproductive hormones in most mammalian therian females. Estrous cycles start after sexual maturity in females and are interrupted by anestrous ...

lasts up to twelve days and occurs every 15 to 44 days. Like many other canids, bush dog mating includes a

copulatory tie Canine reproduction is the process of sexual reproduction in domestic dogs, wolves, coyotes and other canine species. Canine sexual anatomy and development Male reproductive system Erectile tissue As with all mammals, a dog's penis is made up o ...

, during which the animals are locked together. Urine-marking plays a significant role in their pre-copulatory behavior.

Gestation Gestation is the period of development during the carrying of an embryo, and later fetus, inside viviparous animals (the embryo develops within the parent). It is typical for mammals, but also occurs for some non-mammals. Mammals during pregna ...

lasts from 65 to 83 days and normally results in the birth of a litter of three to six pups, although larger litters of up to 10 have been reported. The young are born blind and helpless and initially weigh . The eyes open after 14 to 19 days and the pups first emerge from the nativity den shortly thereafter. The young are weaned at around four weeks and reach sexual maturity at one year. They can live for up to 10 years in captivity.

References

Bibliography

* Nicole Duplaix and Noel Simon, ''World Guide to Mammals''. Mandarin Publishers Ltd. (1976). * Flower WH. 1880
On the bush-dog (''Icticyon venaticus'' Lund)
Proceedings of the Zoological Society of London 1880: 70–76.

External links

*ARKive
images and movies of the bush dog ''(Speothos venaticus)''
*https://web.archive.org/web/20070401091117/http://www.canids.org/species/Speothos_venaticus.htm
ITIS databaseSkeletal morphology data from UT Austin

{{Taxonbar, from=Q191737 Speothos Carnivorans of South America Fauna of the Amazon Fauna of the Guianas Mammals of Bolivia Mammals of Brazil Mammals of Colombia Mammals of Ecuador Mammals of Guyana Carnivorans of Central America Mammals of Peru Near threatened animals Mammals of Venezuela Near threatened biota of South America

bush dog The bush dog (''Speothos venaticus'') is a canine found in Central and South America. In spite of its extensive range, it is very rare in most areas except in Suriname, Guyana and Peru; it was first identified by Peter Wilhelm Lund from fossi ...