Mexican big-eared bat | |
---|---|
In Michoacán, Mexico | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Chiroptera |
Family: | Vespertilionidae |
Genus: | Corynorhinus |
Species: | C. mexicanus |
Binomial name | |
Corynorhinus mexicanus G.M. Allen, 1916 | |
Synonyms | |
Plecotus mexicanus(G.M. Allen, 1916) |
The Mexican big-eared bat (Corynorhinus mexicanus) is a species of vesper bat endemic to Mexico. [1] [2] [3] They are nocturnal and insectivorous. Their very large ears are located across their foreheads, and when captured, the bats are observed to curl their ears in a protective manner. [4] The adults are usually brown colored, while the juveniles are usually a smokey brown color. They have small noses. [5]
The Mexican big-eared bat endemic to Mexico and known between Sonora and Coahuila in the north and Michoacan Yucatán in the south; [1] [2] it is rare in the southern end of its range and uncommon elsewhere. [1] They are found in high, humid, mountain habitats and seem to prefer areas with pine-oak forests, [6] although they have been found around other types of vegetation, such as sycamore, cottonwood and agave. [4] Being a nocturnal species, they rest during the day; their day-time roosts are in open caves [4] and mine shafts. [7]
Studies of the males of the species show they have one long reproductive cycle per year. The timing of their cycle is dependent on both physiological (body condition, neurological, and endocrine signals) and environmental (temperature and resource availability) factors. The male reproductive organs are the smallest in February, March, and April, then begin development in May and reach their biggest size, determined by weight, around August (where they are about 40 times bigger than they were in April). The best body conditions of the bats were found from May to June, which suggests this cycle is dependent on body condition. [8] Females give birth to a single offspring. [3]
In 1996, the species was listed as lower risk/least concern, but in 2008, it was moved to near threatened. The population sizes of this bat are declining, and the species may soon be threatened. [1] The major threat to the species is humans, disturbing their roosts and causing habitat loss. [9]
The New World leaf-nosed bats (Phyllostomidae) are found from southern North America to South America, specifically from the Southwest United States to northern Argentina. They are ecologically the most varied and diverse family within the order Chiroptera. Most species are insectivorous, but the phyllostomid bats include within their number true predatory species and frugivores. For example, the spectral bat, the largest bat in the Americas, eats vertebrate prey, including small, dove-sized birds. Members of this family have evolved to use food groups such as fruit, nectar, pollen, insects, frogs, other bats, and small vertebrates, and in the case of the vampire bats, even blood.
The white-winged vampire bat, a species of vampire bat, is the only member of the genus Diaemus. They are found from Mexico to northern Argentina and are present on the islands of Trinidad and Margarita.
The big-eared woolly bat or (Peters's) woolly false vampire bat is a species of bat, belonging to the family Phyllostomidae.
Gould's long-eared bat is a microbat found in southern regions of Australia. It occurs in eastern Australia, from Queensland to Victoria, and in a smaller isolated range in the south-west of Western Australia.
The lesser long-tongued bat, also called the lesser long-tailed bat, is a bat species from South America.
The yellow-throated big-eared bat or orange-throated bat(Lampronycteris brachyotis) is a species of bat that ranges from southern Mexico to Brazil. It is the only species within the genus Lampronycteris. A frugivore and insectivore, it is found in lowland forest up to an elevation of 700 m. Its activity is greatest in the first two hours after sunset, and peaks again after midnight.
The white-throated round-eared bat is a bat species found from Honduras to Bolivia, Paraguay and Brazil. It creates roosts inside the nests of the termite, Nasutitermes corniger. It thrives on a mainly insect-based diet, focusing on the surfaces of foliage to hunt, and also eats fruit and pollen. It has a very wide range and is a common species over much of that range, so the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".
The genus Corynorhinus consists of the big-eared bats, or American long-eared bats. Only three species occur in the genus, all occurring in North America. Members of this group were previously in the genus Plecotus, the long-eared bats, and were also then called lump-nosed bats. Populations of these species are generally uncommon and declining. Two subspecies, the Virginia big-eared bat and the Ozark big-eared bat are federally endangered.
Rafinesque's big-eared bat, sometimes known as the southeastern big-eared bat, is a species of vesper bat native to the southeastern United States.
Townsend's big-eared bat is a species of vesper bat.
Nyctophilus geoffroyi is a vespertilionid bat. a flying nocturnal mammal found in Australia, The species is relatively common. They have been referred to as the lesser long-eared bat.
The south-eastern long-eared bat or Corben's long-eared bat, is a species of bat found in Australia. It occurs in the woodlands of the Murray Darling Basin and adjacent areas.
Wahlberg's epauletted fruit bat is a species of megabat in the family Pteropodidae. It is commonly found across southern Africa.
The Virginia big-eared bat is one of two endangered subspecies of the Townsend's big-eared bat. It is found in Virginia, West Virginia, North Carolina, and Kentucky. In 1979, the US Fish and Wildlife Service categorized this as an endangered species. There are about 20,000 left and most of them can be found in West Virginia. The Virginia big-eared bat is the state bat of Virginia.
The Mexican dog-faced bat is a bat species of the family Molossidae from Central America. It is found from Nayarit in Mexico to Costa Rica at elevations up to 1500 m. It was formerly considered a subspecies of C. greenhalli. It roosts in deciduous and evergreen forest, and is usually found near small bodies of water.
The Hispaniolan greater funnel-eared bat is a funnel-eared bat species endemic to the island of Hispaniola in the Caribbean. First described in 1902, it has a complex taxonomic history, with some authors identifying multiple subspecies, now recognised as the separate species Natalus primus and Natalus jamaicensis, and others considering Natalus major to be itself a subspecies of Natalus stramineus. It lives primarily in caves and feeds on insects.
The Cuban greater funnel-eared bat is a species of funnel-eared bat. It is endemic to a cave in westernmost Cuba.
The southern big-eared brown bat is a species of bat from the family Vespertilionidae. Although current taxonomy treats the southern big-eared brown bat as a separate species, it is often treated as a subspecies of the small big-eared brown bat. It lives in the forests of southern Argentina and Chile; though the population of the bat in the southern part of its habitat is low, there are no major concerns to justify anything lower than a Least Concern rating in the IUCN Red List.
A maternity colony refers to a temporary association of reproductive female bats for giving birth to, nursing, and weaning their pups. The colonies are initiated by pregnant bats. After giving birth, the colony consists of the lactating females and their offspring. After weaning, juveniles will leave the maternity colony, and the colony itself will break apart. The size of a maternity colony is highly variable by species, with some species forming colonies consisting of ten or fewer individuals, while the largest maternity colony in the world in Bracken Cave is estimated to have over 15 million bats.
The Mexican greater funnel-eared bat is a species of bat found in Central America. While initially and currently described as a species, from 1959 to 2006 it was considered a subspecies of the Mexican funnel-eared bat, Natalus stramineus.