The dwarf bonneted bat, or Peters' mastiff bat, (''Eumops bonariensis''), is a

bat Bats are mammals of the order Chiroptera.''cheir'', "hand" and πτερόν''pteron'', "wing". With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most bi ...

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 ...

from

South South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west. Etymology The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...

and

Central America Central America ( es, América Central or ) is a subregion of the Americas. Its boundaries are defined as bordering the United States to the north, Colombia to the south, the Caribbean Sea to the east, and the Pacific Ocean to the west. ...

Description

As its common name implies, ''E. bonariensis'' is the smallest species of bonneted bat. Adults measure in total length, and typically weigh between . However, there is a significant variation in size between the different

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 ...

, with the smallest, ''E. b. nanus'', weighing as little as . The fur is thick and silky, and ranges from cinnamon to dark chocolate brown, being noticeably paler on the underside of the body. The head has a broad snout with a fringe of stiff hairs on the upper lip, and long, wide, ears connected by a small membrane. The wing membranes are black, but are covered with sparse hairs close to the arms. Males have been observed to have glands on the throat that become enlarged during the breeding season.

Distribution and habitat

Dwarf bonneted bats are found from southern Mexico through the whole of Central America, and in every country of South America except Chile. They inhabit a wide range of environments, from dense rainforest to dry thorny scrub. They are most commonly found in lowland habitats, but have been found as high as in Colombia. Up to four subspecies are recognised: * ''Eumops bonariensis bonariensis'' -

Uruguay Uruguay (; ), officially the Oriental Republic of Uruguay ( es, República Oriental del Uruguay), is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast; while bordering ...

and neighbouring regions of

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 ...

and

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 ...

* ''Eumops bonariensis beckeri'' -

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 ...

, southern Brazil,

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 ...

, northern Argentina * ''Eumops bonariensis delticus'' - northern Brazil, neighbouring regions of other countries * ''Eumops bonariensis nanus'' -

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 ...

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 ...

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 ...

, and north to southern

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

However, ''E. b. beckeri'' is sometimes considered synonymous with the

Patagonian bonneted bat The Patagonian bonneted bat (''Eumops patagonicus''), also called the Patagonian dwarf bonneted bat, is a species of free-tailed bat found in Argentina, Bolivia and Paraguay. Taxonomy and etymology It was described as a new species in 1924 by Br ...

Biology

Dwarf bonneted bats feed on flying insects, primarily beetles and moths. They roost in small groups of up to twenty individuals, and are often found sleeping in the roofs of buildings. They are rapid fliers, often remaining high above the ground. They often make loud calls that are audible to humans. Breeding has been recorded from March to June in Mexico, and from October to November at the southern end of the bat's range. Females give birth to a single young.

References

{{Taxonbar, from=Q301982 Mammals of Colombia Bats of Central America Mammals described in 1800 Bats of South America Taxa named by George Shaw