Eptesicus fuscus

Eptesicus fuscus
Name	Big brown bat
Status	LC
Status system	IUCN3.1
Genus	Eptesicus
Species	fuscus
Authority	Beauvois, 1796

Eptesicus fuscus is a medium- to large-sized vesper bat native to the Americas, noted for its adaptable roosting and foraging habits. Widely encountered in urban, suburban, and wild landscapes, it has been the subject of research by institutions and agencies concerned with wildlife management and zoonoses. Field studies often intersect with work from universities, museums, and conservation NGOs.

Taxonomy and nomenclature

Eptesicus fuscus was described by Ambroise Marie François Joseph Palisot de Beauvois and later treated in taxonomic compilations and revisions by authorities such as the American Society of Mammalogists, the International Commission on Zoological Nomenclature, the Smithsonian Institution, the Natural History Museum, and the Royal Society. Subsequent systematic studies referenced collections curated at the American Museum of Natural History, the Field Museum, the British Museum (Natural History), the Museum of Comparative Zoology, and the California Academy of Sciences, and were informed by molecular work from laboratories associated with Harvard University, Oxford University, the University of California, Cornell University, and the University of Toronto. Nomenclatural decisions cite historic explorers and naturalists whose names appear in works by Linnaeus, Humboldt, Audubon, and Darwin. Modern catalogs and checklists maintained by the IUCN, CITES, and national wildlife services in Canada, the United States Fish and Wildlife Service, and Mexico's CONABIO influence current usage.

Description

Adults of this species display pelage color described in regional field guides published by the National Geographic Society, the Audubon Society, the American Museum of Natural History, and the Royal Ontario Museum. Morphological descriptions reference cranial and dental measurements documented in journals such as the Journal of Mammalogy, the Proceedings of the Royal Society, and the Canadian Journal of Zoology, with comparative anatomy discussed in textbooks authored by Gray, Nowak, and Wilson. External features including forearm length and wing morphology are often illustrated in identification keys produced by the USGS, the British Trust for Ornithology, the Ontario Ministry of Natural Resources, and the Australian Museum for comparative chiropteran studies. Diagnostic characters appear alongside photographs and plates from publications by the National Wildlife Federation, the Natural History Museum of Los Angeles County, and the Cornell Lab of Ornithology.

Distribution and habitat

The geographic range of this bat spans regions documented in atlases and reports from agencies like Parks Canada, the US National Park Service, the Mexican National Institute of Ecology, and the Pan American Health Organization. Field surveys and distribution maps appear in state and provincial wildlife reports from California Department of Fish and Wildlife, Florida Fish and Wildlife Conservation Commission, Texas Parks and Wildlife Department, Ontario Ministry of the Environment, and Quebec's Ministère de l'Environnement. Ecological literature referencing habitats from boreal to tropical zones includes studies by the Smithsonian Tropical Research Institute, the Organization of American States, the World Wildlife Fund, Conservation International, and regional universities such as the University of British Columbia, Universidad Nacional Autónoma de México, and the University of São Paulo. Urban ecology research involves collaborations with municipal agencies in New York City, Chicago, Los Angeles, Toronto, and Vancouver.

Behavior and ecology

Foraging behavior, echolocation, and prey selection have been investigated in papers from institutions including the Max Planck Institute, the Royal Society, the American Association for the Advancement of Science, and the Bat Conservation International network. Studies cite methods and findings from laboratories at Johns Hopkins University, Yale University, Duke University, the University of Michigan, and McGill University. Predator–prey interactions and parasite assemblages are discussed in literature produced by the Centers for Disease Control and Prevention, the Pasteur Institute, the Wellcome Trust, and veterinary schools at Colorado State University, the University of Pennsylvania, and the University of Glasgow. Roosting ecology and night-time movements are documented in reports by the National Audubon Society, the US Fish and Wildlife Service, the British Ecological Society, and local bat groups in California, Texas, Ontario, and New England.

Reproduction and lifecycle

Reproductive biology, maternity colonies, and juvenile development have been detailed in monographs and articles by researchers affiliated with Rutgers University, the University of Illinois, the University of Arizona, Indiana University, and the University of Minnesota. Lifecycle stages and phenology are treated in conservation plans and species accounts from state wildlife agencies, university extension services, the Canadian Wildlife Service, the Mexican Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, and long-term studies conducted through networks coordinated by Bat Conservation International and the North American Bat Monitoring Program. Demographic analyses appear in journals such as Ecology Letters, Oecologia, and Conservation Biology.

Conservation status and threats

The IUCN Red List assessment and regional conservation statuses are used by organizations including the World Conservation Union, NatureServe, Environment and Climate Change Canada, the US Fish and Wildlife Service, and Mexico's Secretaría de Medio Ambiente y Recursos Naturales. Threats documented in conservation literature encompass habitat modification addressed by the United Nations Environment Programme, agricultural practices examined by the Food and Agriculture Organization, pesticide impacts studied by the Environmental Protection Agency, and white-nose syndrome research conducted by the US Geological Survey, the Centers for Disease Control and Prevention, and academic partners at Michigan State University and the University of Wisconsin. Conservation measures and outreach efforts are coordinated by NGOs and institutions such as Bat Conservation International, The Nature Conservancy, the Wildlife Conservation Society, local chapters of the Sierra Club, and municipal parks departments.

Category:Bats