Effective March 1 until further notice, Penobscot East Trail, Jordan Cliffs Trail, Precipice Trail, and Valley Cove Trail will close to provide peregrine falcons adequate space for nesting. Also, the Precipice Trail parking lot will be closed to vehicles. More
A curious young red fox eyes the camera along Acadia's Park Loop Road.
Matthew Lambert / Friends of Acadia
Mammal species in Acadia might not always be the easiest to find, but the park is home to a broad diversity of them. The most frequently seen are deer and squirrels, but with patience, knowledge of their habits, and a keen eye, other species can be found too. Fox, mink, otters, fishers, marten, porcupines, beavers, raccoons, bats, small rodents, coyotes, snowshoe hare, and even bobcat and have all been spotted here. Learn more about how to see animals in Acadia on the Viewing Wildlife page.
Snowshoe Hare have a summer and winter coat that changes color to match the seasons. The easiest time of year to see hares is when they are in between coat changes.
NPS Photo
Herbivores
Acadia's largest wildlife inhabitants are in the ungulate family. This includes white-tailed deer and very rarely moose. As very large mammals that need a great deal of space, moose are rarely seen in Acadia. White-tailed deer, on the other hand, are plentiful. Your best bet to see them is at dawn or dusk around the Sieur de Monts area or along the carriage roads.
Other herbivorous animals that are often overlooked are our resident lagomorph or rabbit species. The Snowshoe Hare is very large compared to the more familiar cottontail rabbit. Snowshoe hares are well known for being brown in the summer and pure white in the winter. The best time of year to see them is during early spring and fall when their coat color is changing.
A mink carries a tasty meal of a brook trout caught near the Tarn.
Photo by William Sweet, Friends of Acadia, NPS
Carnivores
Though seldom seen, carnivores play an important role in the ecosystems of Acadia. With discerning eyes, signs of red foxes and coyotes are found around the park. Raccoons also reside in the park, and provide a great reason to store your food properly at campgrounds. Striped- Skunks are a nocturnal species, and are more likely to be seen at night along the carriage roads. More secretive animals like bobcats, otters, mink, fishers and pine martens live in the park as well. When hiking more remote trails in the park, keep a sharp eye out for movement to spot these park residents. Black bears are rarely seen in the park but there is a permanent year round population on Mount Desert Island. Being connected to the mainland, the Schoodic Peninsula area of the park has more frequent sightings of these secretive creatures.
Beavers are most active at dusk and dawn.
Photo by Will Greene, Friends of Acadia, NPS
Rodents
Most people think of rats and mice when they think of rodents, but Acadia is home to more than just that! We have several species of mice as well as beaver, woodchuck, porcupine, muskrat, voles, chipmunks, squirrels, and even flying squirrels.
North American Beaver are the most noticeable species in the rodent family here. Like humans, they drastically modify their home environment by building dams and cutting down trees, creating wetlands and other habitats that are used by many other species. Walk around Jordan Pond, the Tarn or Witch Hole Pond to see chewed stumps and other signs of beaver activity. While beavers were almost trapped to extinction by the beginning of the 20th century, they've come back in force and can be found throughout the park.
Bats
Bats are an often overlooked wildlife species because they are most active when we are the least active. All night long bats in Acadia National Park are busy feeding on thousands of insects. Many of these insects are considered nuisances and bats do an excellent job in keeping their numbers down. Little brown bats and eastern small-footed bats are two of the eight species of bats that have been found in Acadia.
Today, bats are an important research species in the park because of their dramatic population decline as a result of white-nose syndrome. Bat species in Acadia National Park have decline over 80%. The park and their partners are working to understand their role in the ecosystem, where their most important habitat is, and how we can help them recover including the federally threatened Northern Long-eared Bat.
NPS Photo by Nicole Ball
Other Mammals
Other mammal species present in Acadia include marine mammals like seals, whales, and porpoises. Intertidal creatures like sea star, lobster, and sea anenomes can also be found along Acadia’s coast. The marine wildlife page is a great place to learn more about the creatures that live in the ocean around Acadia National Park.
Locations:Acadia National Park, Catoctin Mountain Park, Chesapeake & Ohio Canal National Historical Park, Death Valley National Park, Devils Tower National Monument, Fire Island National Seashore, Fort Laramie National Historic Site, Grand Canyon-Parashant National Monument, Great Basin National Park, Jewel Cave National Monument, Joshua Tree National Park, Lake Mead National Recreation Area, Mojave National Preserve, Prince William Forest Park, Rock Creek Park, Shenandoah National Park, Wind Cave National Parkmore »
Bats are amazing animals and a formidable force against insect pests, but a nasty fungal disease is killing them. A coordinated national response brings hope.
Acadia National Park has one of the longest-running bat monitoring programs in the agency. A team of researchers modernized how the park processed its bat data. Now there are apps for that.
Offices:Natural Resource Condition Assessment Program
Myotis bats experienced population declines after white-nose syndrome appeared in Acadia National Park in 2011–2012. The bats, however, are hanging on. You can read about (and hear!) these flying mammals, how they’re doing now, and park efforts to monitor them, including through the use of acoustic recordings.
Red squirrels, chipmunks, ermine, and other small mammals are part of Acadia’s community of wildlife. Encounters between wildlife and human activity, including park management, may be stressful for animals. Dr. Brittany Slabach, a lecturer of biology at Trinity University in Texas, has been studying how landscape ecology and park management affect biodiversity of small mammals.
Mount Desert Island is a watery place, thanks in part to the presence of beavers.
Today, few visitors are likely to encounter a beaver. But many visitors –- as they experience a watery landscape vibrant with life -- enjoy the influence of beavers in Acadia.
Locations:Acadia National Park, Appalachian National Scenic Trail, Eleanor Roosevelt National Historic Site, Home Of Franklin D Roosevelt National Historic Site, Marsh - Billings - Rockefeller National Historical Park, Minute Man National Historical Park, Morristown National Historical Park, Saint-Gaudens National Historical Park, Salem Maritime National Historic Site, Saratoga National Historical Park, Saugus Iron Works National Historic Site, Vanderbilt Mansion National Historic Site, Weir Farm National Historical Parkmore »
Offices:Inventory and Monitoring Division, National Heritage Areas Program
The northern short-tailed shrew seems like an impossible mash-up of different creatures. From venomous saliva to echolocation, this tiny predator employs many tactics to satiate an endless appetite.
Locations:Acadia National Park, Appalachian National Scenic Trail, Eleanor Roosevelt National Historic Site, Home Of Franklin D Roosevelt National Historic Site, Marsh - Billings - Rockefeller National Historical Park, Minute Man National Historical Park, Morristown National Historical Park, Saint-Gaudens National Historical Park, Salem Maritime National Historic Site, Saratoga National Historical Park, Saugus Iron Works National Historic Site, Vanderbilt Mansion National Historic Site, Weir Farm National Historical Parkmore »
Offices:Inventory and Monitoring Division, National Heritage Areas Program
The eastern coyote is a new predator on the scene. But where did it come from and why is it so much larger than its western cousins? Learn about how this animal came to be and the important ecological niches it is filling in the Northeast.
Bats are an important part of our ecosystem, providing many benefits for humans. Science helps us understand both resident and migratory bat species and the challenges they face. Update: This video contains sequences in which researchers catch, examine, tag, and release bats as part of ongoing inventory and monitoring studies. During the COVID-19 crisis, this practice has been suspended to avoid any chance of passing disease along to study subjects.
