Scientific Name
Eumops floridanus
Family
Molossidae
Global Conservation Status (IUCN)
Vulnerable
United States Conservation Status
Endangered
Diet
Insectivore

Data Sheet

Pronunciation: you-mops floree-dan-us

Florida bonneted bats (Eumops floridanus) are endemic to south Florida, inhabiting the area south of Orlando to Miami, along both coasts. They are among the largest bats in the United States, with wingspans of up to 20 inches. These bats have large, forward-facing ears that give them the appearance of wearing a bonnet. Florida bonneted bats are insectivores, capturing their prey while in flight.

Threats: 

The primary threats to this species include habitat destruction, fragmentation, and modification due to development and agriculture. Disease, small population size, climate change effects, pesticide use, and restricted range also endanger these bats.

Habitat

Florida bonneted bats forage in various open habitats, including pine and hardwood forests, agricultural areas, golf courses, and neighborhoods. They roost in natural pine tree cavities, under barrel roofing tiles, and in bat houses. These bats use forests, wetlands, open water, and even residential and urban areas.

Sound: 

Their echolocation calls fall within the lower frequency range (10-25 kilohertz), which humans can hear.

Diet: 

Florida bonneted bats feed on flying insects such as beetles, flies, bugs, and moths. They stay active year-round, relying on a consistent food supply for their high metabolism.

Behavior: 

This species is highly social, roosting in small groups of around 12 individuals, with a dominant male and multiple females with their pups. Occasionally, groups of up to 50 individuals can be found, most likely due to limited roost availability.

Size & Shape: 

Florida bonneted bats have large, rounded ears positioned in the middle of their heads, creating a bonnet-like appearance. Adults weigh 27 to 59 grams (~1 – 2.1 oz) and have wings up to 20 inches long. Their long, narrow wings are well-suited for rapid, prolonged flight in open areas. The bat’s fur varies from black to brownish-gray or cinnamon brown, with paler fur on the underside. The hairs are bicolored, with lighter bases than tips.

Life Span: 

These bats live 10 to 20 years, with an average generation time of 5 to 10 years.

Reproduction: 

Florida bonneted bats breed year-round, with peak activity in April. Their average litter size is one pup.

Range: 

Found in south Florida, their core range includes Polk, Charlotte, Lee, Collier, Monroe, and Miami-Dade counties. Recent data also show their presence in portions of Highlands, Okeechobee, Glades, Palm Beach, and Broward counties.

For more information on Bat Conservation International’s work with Florida bonneted bats: Endangered Species Interventions, Miami Bat Lab