Phyllostomidae Author Don E. Wilson Author Russell A. Mittermeier text 2019 2019-10-31 Lynx Edicions Barcelona Handbook of the Mammals of the World – Volume 9 Bats 444 583 book chapter http://doi.org/10.5281/zenodo.6458594 adeeb71f-7f8d-4e00-bc9f-35089363f76e 978-84-16728-19-0 6458594 113. Tricolored Big-eared Bat Glyphonycteris sylvestris French: Glyphonyctere sylvestre / German: Dreifarbige GroRohrblattnase / Spanish: Glifonicterio silvestre Other common names: Brown Small-eared Bat , Little Graybeard Bat , Tricolored Bat Taxonomy. Glyphonycteris sylvestris Thomas, 1896 , “Imravalles [= Hacienda Miravalles, Guanacaste ], Costa Rica .” Glyphonycteris sylvestris was included in Micronycteris . Monotypic. Distribution. Patchily distributed from C Mexico ( Nayarit and Veracruz ) through Central America ( Honduras , Nicaragua , Costa Rica , and Panama ) into South America, including Colombia , Venezuela , the Guianas, Brazil , E Ecuador , and E Peru ; also on Trinidad 1. Descriptive notes. Head-body 48-56 mm, tail 9-12 mm, ear 17-22 mm, hindfoot 11-12 mm, forearm 38-44 mm; weight 7-11 g. The Tricolored Big-eared Bat is similar to Davies’s Big-eared Bat (G. davies) but smaller. Dorsal hair is tricolored. Ears are large, wide, and pointed. Dental formula is12/2, C1/1,P 2/3 M 3/3 ( x2 ) = 34. Habitat. Primary and little-disturbed humid tropical and subtropical forests at elevations of 15-1300 m. The Tricolored Big-eared Bat inhabits terra firma and seasonally inundated forest. Food and Feeding. The Tricolored Big-eared Bat is a gleaning insectivore and apparently eats some fruits. Breeding. Reproductive period of the Tricolored Big-eared Bat apparently begins in rainy seasons. In Mexico , none of 13 specimens captured in December were sexually active; females were not pregnant, and testes of the males were small. Activity patterns. The Tricolored Big-eared Bat is nocturnal. It roosts in caves, tunnels, and hollow trees. Movements, Home range and Social organization. The Tricolored Big-eared Bat forms colonies. In Trinidad Island , a colony of 75 individuals was found, sharing space with the Greater Sac-Winged Bat (Saccopteyx bilineata). In Mexico, a colony of 25 individuals was found in a cave, and in another cave, a single individual was found together with four Gray Sac-winged Bats ( Balantiopteryx plicata ). Status and Conservation. Classified as Least Concern on The IUCN Red List. The Tricolored Big-eared Batis rare, patchily distributed, and poorly known. Apparently, its conservation status is stable in most of its distribution. Bibliography. Felix et al. (2016), Goodwin & Greenhall (1961), Hall & Dalguest (1963), Linares (1987), Medina-Fitoria & Saldana (2012), Morales-Martinez & Suérez-Castro (2014), Simmons (1996), Tirira (2017), Tirira et al. (2016), Williams & Genoways (2008).