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Bat Identification Guide
Bats in New England
Bats are hard-working night flyers that keep insect populations under control and play a vital role in New England’s ecosystem. Throughout the region, several bat species share the skies, from forest-dwelling migrants to attic-roosting residents. However, despite their positive impact on the local environment, there are hygiene risks associated with bats - in addition to the structural damage they can cause.
Understanding which species live nearby can help homeowners and businesses manage infestations safely and responsibly before issues develop. This bat identification guide explains how to recognize the most common species in the region, what makes them unique, and where they’re likely to roost.
The big brown bat is a stocky, medium-sized species with dark brown fur and a wingspan of up to 13 inches. Hardy and adaptable, they are strong fliers and excellent navigators, capable of catching beetles, moths, and other flying insects midair. They’re also known for their ability to tolerate colder temperatures.
Smaller and glossier in color, this species once dominated the region but is in decline due to the impact of the fungal disease, White-nose Syndrome. It measures three to four inches long, forms large colonies, and eats mosquitoes and beetles, providing natural pest control.
Other Bat Species in New England
While big brown and little brown bats are the most prevalent species across New England, several others also share the region’s airspace. Among the most common are the silver-haired Bat (Lasionycteris noctivagans), the Eastern red bat (Lasiurus borealis), and the hoary bat (Lasiurus cinereus). Each has its own distinct markings, habits, and seasonal behaviors, making them fascinating to observe from a distance. These bats are less likely to roost in homes or commercial buildings, but play equally important roles in local ecosystems.
Silver-haired Bat
The silver-haired bat is a medium-sized species that has dark fur, frosted with silver or white tips. It’s a solitary bat that prefers dense forests, near lakes, ponds, and streams where insects are plentiful. During migration or cold spells, it occasionally roosts in buildings, behind shutters, under loose siding, or inside outbuildings.
Unlike species that form colonies, these bats typically roost alone or in small groups. They are among the earliest to emerge in the evening. Because they favor wooded habitats, sightings are more common around rural properties or commercial facilities surrounded by trees and open water.
Eastern Red Bat
The Eastern red bat is one of New England’s most colorful mammals. Males have bright orange-red fur, while females appear paler, with frosted white tips that provide camouflage among autumn leaves. These bats roost in tree canopies, hanging from branches by one foot during the day - a habit that makes them appear like dry leaves fluttering in the breeze.
They are solitary, strong, and fast fliers that migrate south for the winter. They’re seldom found indoors but may pass through residential neighborhoods and industrial areas during migration. If you see one, it’s a sign of healthy insect populations and balanced local ecosystems.
Hoary Bat
The hoary bat is the largest species in New England, with a wingspan reaching up to 16 inches. So-named for its long, dark, white-tipped fur, giving it a ‘hoary’ or misty look. This bat roosts high in trees, often concealed among dense foliage, and hunts over open fields and clearings at dusk.
They are long-distance migrants, traveling to warmer climates during winter, and rarely enter buildings. However, they can sometimes be seen resting in parks, wooded areas, or near large commercial properties with mature trees. Their powerful flight and striking appearance make them one of New England’s most remarkable nocturnal species.
How to Identify Bats in Your Area
Most bats are active only at night, which makes identification challenging. Observing from a safe distance is best; never try to handle a bat, as frightened animals may bite and can carry diseases, like rabies. Look for details such as body size, color, and flight pattern. Big brown bats tend to fly slowly in broad circles, while little browns dart quickly and close to water or vegetation. Tree-roosting bats, such as red and hoary species, appear earlier at dusk and often travel higher above the ground.
Sound can also be a clue. Although most bat calls are ultrasonic, some produce faint chirps or squeaks (called echolocation) to help them navigate. If you’re ever in doubt or concerned by bat activity, contact JP Pest Services for a professional inspection and humane bat removal service.
Key Features of Common Bats
Identifying bats across New England becomes easier when you know a few defining features:
- Size and Wingspan: Little browns measure about three inches long; big browns, around five. Tree-roosting Hoary Bats can span 16 inches wingtip to wingtip.
- Color and Markings: Big browns are dark chocolate; little browns show glossy brown tones; silver-haired and hoary Bats display frosted fur; Eastern reds glow with rust-orange hues.
- Ears and Face: The Eastern small-footed bat has tiny feet and short ears, distinguishing it from other local species.
- Behavior: Big browns often hibernate inside structures; hoary and red bats migrate south; silver-haired Bats remain solitary.
- Preferred Roosts: Tree-dwellers stay outdoors, while attic and barn roosters, including big and little browns, regularly enter homes and commercial buildings.
Because many species look similar, professional identification using guano analysis, roosting patterns, and acoustic monitoring is the most reliable method.
Where Bats Are Most Commonly Found
Across New Hampshire and the wider New England region, bats thrive anywhere insects are abundant. Forest edges, river valleys, and lakeshores provide ideal feeding grounds, but urban and rural structures now serve as substitutes for natural caves.
Homes with easy roof access, open vents, or gaps in siding attract bats searching for warmth and shelter; attics and chimneys, in particular, make perfect nurseries for raising pups. Droppings (guano) near entry points or brown stains along rooflines often signal an active roost.
Bats are also frequent visitors to orchards, pastures, and ponds where insects swarm at dusk. Farmers often benefit from their feeding habits, but open barns and sheds can easily become roosting sites. Regular structural checks and sealing gaps larger than half an inch can help to deter them.
Whether you’re a homeowner or manage a business, your building is a potential target for bats. They can squeeze through the tiniest opening, which makes prevention and timely bat removal essential.
Industries We Serve
JP Pest Services is a trusted commercial pest control provider to businesses across the region. Large spaces such as warehouses, factories, or grocery distribution centers mimic natural caves. High rafters, signage voids, and loading docks provide quiet shelter where colonies can remain hidden for months. Routine inspections and maintenance help prevent infestations that can threaten sanitation standards or disrupt operations.
Frequently Asked Questions
Common signs of bat activity include small piles of bat droppings (guano) near rooflines or attic vents, dark, greasy stains around entry points, and faint squeaking or fluttering sounds at dusk when bats leave to feed. You may also notice a strong, musty odor or brownish stains seeping through the ceilings where guano has accumulated above.
If you see or suspect bats on your property, avoid handling them and contact JP Pest Services for a humane bat exclusion. Our trained experts safely guide bats out of your structure using one-way devices, then seal every potential entry point to prevent re-entry. Attempting DIY removal can trap bats inside or violate wildlife protection laws. Professional exclusion ensures your home or business stays secure while keeping the bats safe and in compliance with state regulations.
Accurate bat identification helps determine the right control approach and timing. Each bat species behaves differently: some hibernate through the winter, while others migrate seasonally. Therefore, understanding which species is present ensures humane and effective removal. Proper identification also supports conservation efforts for species affected by White-nose Syndrome and ensures compliance with New England’s wildlife laws.