2 Types of Bats in Delaware
Yes, Delaware is home to 8 species of bats that are vital to the state's natural balance. These nocturnal mammals are expert insect hunters, helping to control pests in both agricultural and suburban areas. This guide covers the common kinds of bats you will encounter from the Brandywine Valley to the Atlantic coast.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.
- 4
- species recorded
- April, July, June
- peak months
Verified species, source iNaturalist
2 types of bats recorded in Delaware
2 bat species have a verified observation record in Delaware across bats (order Chiroptera), each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.
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2
Plus 1 more recorded only rarely (fewer than 10 verified sightings). Counts from verified iNaturalist observations. Photos by iNaturalist observers, reused under the licence each observer chose.
Real sighting data, source iNaturalist
86 verified observations on iNaturalist of bat have been recorded in Delaware, most often in April, July, June.
When bat are recorded in Delaware
Yes, Delaware is home to 8 species of bats that are vital to the state's natural balance. These nocturnal mammals are expert insect hunters, helping to control pests in both agricultural and suburban areas. This guide covers the common kinds of bats you will encounter from the Brandywine Valley to the Atlantic coast.
What are the most common bat species in Delaware?
The big brown bat is the most frequently seen species in Delaware, often roosting in buildings and trees. The red bat is also common, known for its distinctive reddish fur and its habit of roosting in foliage. Other species include the silver-haired bat and the hoary bat, which are often seen during their seasonal migrations.
Where are the best places for bat watching in Delaware?
State parks like Lums Pond and Cape Henlopen offer excellent opportunities to see bats foraging over water and open fields at dusk. The wooded areas along the Christina River and the many wildlife areas in Kent and Sussex Counties are also prime spots. Check ourDelaware wildlife guidefor more location ideas.
How can you identify different bat types in Delaware?
Size and color are the best clues. The big brown bat has a wingspan of about 12 inches and uniform brown fur. The red bat is smaller with bright, rusty-red fur. The silver-haired bat has dark fur with silver-tipped hairs, giving it a frosted appearance. For more identification tips, see ourbat identification guide.
What is the importance of bats to Delaware's environment?
Bats are incredible insectivores, with a single bat capable of eating thousands of mosquitoes and other pests in a single night. This natural pest control is invaluable for Delaware's farmers and residents alike, reducing the need for chemical sprays and supporting a more sustainable ecosystem.
Bat-themed gifts for nature lovers
If you appreciate the work bats do for Delaware, you might enjoy these themed items for your home or as a gift.
Bat Silhouette Coffee Mug []() A stylish ceramic mug featuring a classic bat design. Perfect for enjoying your morning brew while thinking about the night's activity. Check Price and Availability
When do bats hibernate in Delaware?
Delaware's bats typically begin hibernating in late October or November as temperatures cool and insects become scarce. They seek out caves, rock crevices, or even man-made structures like attics where they can stay safe and dormant until the spring thaw in late March or April.
Are bats in Delaware affected by white-nose syndrome?
Yes, white-nose syndrome has been a significant concern for bat populations in Delaware and throughout the Northeast. This fungal disease can cause high mortality in hibernating species. The state's wildlife biologists monitor colonies and work to protect critical habitats to help populations recover.
What should I do if I find a bat in my Delaware home?
If a bat enters your home, try to confine it to a single room and open a window or door to let it fly out on its own. If it remains, contact a local animal control officer or wildlife professional for assistance. Never handle a bat with your bare hands, as they can bite if they feel threatened.
Can I attract bats to my Delaware yard?
Yes, installing a bat house on a sunny, south-facing wall or pole is a great way to provide a safe home for local bats. Avoid using pesticides in your garden to ensure they have plenty of insects to eat. Providing a small water source like a birdbath can also make your yard more attractive to foraging bats.
Gear and field guides
Frequently asked questions
What are the most common bat species in Delaware?+
The big brown bat is the most frequently seen species in Delaware, often roosting in buildings and trees. The red bat is also common, known for its distinctive reddish fur and its habit of roosting in foliage. Other species include the silver-haired bat and the hoary bat, which are often seen during their seasonal migrations.
Where are the best places for bat watching in Delaware?+
State parks like Lums Pond and Cape Henlopen offer excellent opportunities to see bats foraging over water and open fields at dusk. The wooded areas along the Christina River and the many wildlife areas in Kent and Sussex Counties are also prime spots. Check ourDelaware wildlife guidefor more location ideas.
How can you identify different bat types in Delaware?+
Size and color are the best clues. The big brown bat has a wingspan of about 12 inches and uniform brown fur. The red bat is smaller with bright, rusty-red fur. The silver-haired bat has dark fur with silver-tipped hairs, giving it a frosted appearance. For more identification tips, see ourbat identification guide.
What is the importance of bats to Delaware's environment?+
Bats are incredible insectivores, with a single bat capable of eating thousands of mosquitoes and other pests in a single night. This natural pest control is invaluable for Delaware's farmers and residents alike, reducing the need for chemical sprays and supporting a more sustainable ecosystem.
When do bats hibernate in Delaware?+
Delaware's bats typically begin hibernating in late October or November as temperatures cool and insects become scarce. They seek out caves, rock crevices, or even man-made structures like attics where they can stay safe and dormant until the spring thaw in late March or April.
Are bats in Delaware affected by white-nose syndrome?+
Yes, white-nose syndrome has been a significant concern for bat populations in Delaware and throughout the Northeast. This fungal disease can cause high mortality in hibernating species. The state's wildlife biologists monitor colonies and work to protect critical habitats to help populations recover.
What should I do if I find a bat in my Delaware home?+
If a bat enters your home, try to confine it to a single room and open a window or door to let it fly out on its own. If it remains, contact a local animal control officer or wildlife professional for assistance. Never handle a bat with your bare hands, as they can bite if they feel threatened.
Can I attract bats to my Delaware yard?+
Yes, installing a bat house on a sunny, south-facing wall or pole is a great way to provide a safe home for local bats. Avoid using pesticides in your garden to ensure they have plenty of insects to eat. Providing a small water source like a birdbath can also make your yard more attractive to foraging bats.
Keep exploring
More places to see bat
More wildlife in Delaware