Media & Education
Species Profiles

Species Profiles

Eumops floridanus
Common Name: Florida bonneted bat
Family: Molossidae
Genus: Eumops
Species: floridanus

Priority Species for Global Bat Conservation

Conservation Status: Vulnerable (IUCN)
The total population is estimated at fewer than 1000 individuals.

The Threats: Loss and degradation of habitat due to human activities and occasional hurricanes has been devastating for this species. It’s very small population size and restricted range make recovery especially difficult and slow. In addition, the U.S. Fish & Wildlife Service, in listing the bat as Endangered in November 2013, said climate change, “including sea-level rise and coastal squeeze,” is likely hit the species very hard.

The Conservation Plan: Bat Conservation International and its partners, including the US Fish and Wildlife Service, the National Park Service, the Florida Fish and Wildlife Conservation Commission, and the University of Florida, are supporting extensive research to identify any additional roosts of this embattled species, as well as efforts to protect the few known roosts and perhaps to provide artificial roosts where needed. Through these partnerships, we are working to fill in critical gaps in their natural history, including their roost needs, foraging ecology and diet. These bats have demonstrated remarkable resilience, and my even be holding on in human structures in the highly-developed Miami area.

The Florida bonneted bat is Florida's largest and rarest bat and may be one of the most critically endangered mammals in North America. Since 2003, surveys have documented this bat in only seven Florida counties. Biologists estimate that the entire population of Florida bonneted bats may be less than a 1,000 individuals. This species is vulnerable to a wide variety of threats, including urbanization and habitat loss, small population size, restricted range, low fecundity and relative isolation. On November 1, 2013, the U.S. Fish and Wildlife Service formally listed the Florida bonneted bat as Endangered. We need your urgent support before it is too late to pull this species back from the very brink of extinction.

With a wingspan of up to 18 3/4 inches and weight of 37-47g, it is about 70 percent bigger than the Mexican free-tailed bat. Florida bonneted bats (formerly known as Wagner's mastiff bats) inhabit semitropical forests and have been documented roosting singly or in small colonies in a variety of locations, including limestone outcroppings, tree hollows, bat houses, chimneys and in Spanish tile roofs. Today, however, this bat is only known to occupy a few bat houses, an abandoned house, and a few tree cavities. Do you want to know if you have this rare and endangered bat on your property? Use this guide (in English or Spanish) to identify the bats in your south Florida area.

Guide [English] Guide [Spanish]

Approximate Range:

Source: IUCN Red List

Further Reading From BATS Magazine

Stay up to date with BCI

Sign up and receive timely bat updates

BCI relies on the support of our amazing members around the world.

Our mission is to conserve the world’s bats and their ecosystems to ensure a healthy planet.

Please join us or donate so our work can continue.