5 Types of Bats in Massachusetts

Massachusetts hosts nine bat species, including the little brown bat, big brown bat, eastern red bat, hoary bat, silver haired bat, and tri colored bat. The little brown bat was once the most widespread but has declined significantly due to white nose syndrome. The big brown bat is larger and more resilient, with a wingspan that can reach up to 13 inches. Eastern red bats are solitary and roost in trees, making them harder to find than the colonial species. You can find more details on these species by visiting ourMassachusetts wildlife hubor the dedicatedbat guidefor the state.

To identify bats in the field, you should focus on their size, ear shape, and fur color. Little brown bats are small with glossy brown fur and a plain nose. Big brown bats are noticeably larger with a blunt snout and dark brown fur. The eastern red bat is medium sized with distinctive reddish fur and white shoulder patches. Hoary bats are the largest in the state and have frosted fur that looks like a coat of rime. Most identification happens at dusk when they emerge to feed, so pay attention to their flight patterns and the habitats where they are active. For general facts about these animals, check out ourbatpage.

Bats are most commonly spotted near water sources like ponds, lakes, and rivers where insects are abundant. The Quabbin Reservoir and the Connecticut River Valley are prime locations for bat watching. You might also see them near old barns, bridges, and attics, which provide excellent roosting sites. Cape Cod National Seashore is another great spot for observing migratory species during the late summer. Always remember to keep a respectful distance from roosting bats to avoid disturbing them. You can plan your next outing using ourMassachusetts batguide.

The peak season for bat activity in Massachusetts is from May through September. The best time to see them is during the first 30 minutes after sunset when they emerge from their roosts to hunt. Warm, calm evenings are the most productive because insects are more active in these conditions. During the winter, most species either migrate south or enter a deep hibernation in caves or mines, making sightings very rare until the spring return. If you want to see them in action, a summer evening near a still body of water is your best bet.

All nine bat species in Massachusetts are insectivores. They play a vital role in pest control by consuming massive quantities of mosquitoes, moths, beetles, and flies. A single little brown bat can eat up to 1,000 mosquito sized insects in just one hour. This feeding behavior is why you often see them swooping over water or near streetlights where insects congregate. By naturally managing these populations, bats provide a valuable service to farmers and residents alike, reducing the need for chemical pesticides.

Bats are not aggressive animals and will not attack humans, but they should never be handled. Like any mammal, they can carry rabies, although the percentage of infected bats is very low. If you find a bat on the ground or inside your home, you should contact local animal control or a wildlife professional. When left alone, bats are a safe and beneficial part of the environment. Watching them from a distance as they hunt is a safe way to enjoy the state's nocturnal wildlife. You can find more safety tips on our mainbatpage.

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Yes, all bats in Massachusetts are protected by state law. Several species, including the northern long eared bat and the little brown bat, are listed as endangered due to the devastating impact of white nose syndrome. It is illegal to kill, harass, or possess a bat in the state without a specific permit. These protections are in place to help populations recover from recent declines. If you have bats in your attic and need them removed, you must follow state approved exclusion methods that do not harm the animals during their breeding or hibernation seasons.

No, not all species in the state hibernate locally. Massachusetts bats are divided into two groups: cave bats and tree bats. Cave bats, such as the big brown and little brown bats, typically spend the winter in deep hibernation within caves, mines, or even buildings where temperatures remain stable. Tree bats, including the eastern red bat and hoary bat, are migratory. They fly south to warmer climates for the winter, much like many bird species. This diverse survival strategy allows different types of bats to thrive across varying habitats in the Northeast.

The smallest bat in the state is the tri colored bat, formerly known as the eastern pipistrelle. This tiny mammal only grows to about 3 inches in length and weighs less than a quarter of an ounce. They are easily identified by their yellowish brown fur and unique tri colored hairs that are dark at the base, light in the middle, and dark at the tip. Because of their small size, they are often mistaken for large moths when they are flying at dusk. Like many other local species, the tri colored bat is currently facing significant threats and is a priority for conservation efforts.

The best way to attract bats to your property is to provide them with a suitable roosting site and a reliable food source. Installing a bat house is a great first step, provided it is placed in a sunny location at least 15 feet off the ground. Maintaining a garden with night blooming flowers can attract the moths and other insects that bats feed on. Avoiding the use of pesticides will ensure there is a healthy insect population for them to hunt. Providing a nearby water source, such as a birdbath or a small pond, will also make your yard more attractive to these helpful nocturnal neighbors.

Yes, bats are frequently seen on Cape Cod, especially during the spring and fall migration periods. The open marshes and woodlands of the Cape provide excellent hunting grounds for many species. Eastern red bats and hoary bats are particularly common in the coastal forests during the summer. If you are visiting the Cape Cod National Seashore, keep an eye on the sky just after sunset near the freshwater ponds. You can learn more about coastal wildlife by checking ourMassachusetts wildlifeguide for regional highlights.