Bald Eagle

Haliaeetus leucocephalus

Order: Accipitriformes / Family: Accipitridae

Wikimedia Commons

black brown white large raptor wetland coastal forest migratory year-round common widespread

About the Bald Eagle

The Bald Eagle (Haliaeetus leucocephalus) serves as a powerful emblem of the United States, embodying the spirit of freedom and strength. This majestic raptor, with its distinctive white head and tail contrasting against a dark brown body, commands attention wherever it is found. The Bald Eagle thrives in a variety of habitats ranging from the wetlands of Florida to the rugged coastlines of Alaska. Their presence often indicates a healthy ecosystem, as they are top predators and scavengers. Not only do they symbolize national pride, but Bald Eagles also play a crucial ecological role in maintaining the balance of their environments. During the breeding season, they build large nests in tall trees or on cliffs, often returning to the same site each year to raise their young. These nests, known as aeries, can be several meters across and weigh up to a ton, a testament to their engineering prowess. Bald Eagles are opportunistic feeders, primarily consuming fish but also hunting birds and mammals, or scavenging carrion. In winter, they congregate in large numbers near open water where fish are abundant, showcasing their adaptability. Throughout the year, the Bald Eagle's behavior changes with the seasons. During spring and summer, they exhibit strong territorial instincts, defending nests against intruders. In contrast, the non-breeding months see them adopting more social behaviors, often gathering in communal roosts to conserve warmth and deter predators. The Bald Eagle's recovery from the brink of extinction due to DDT and habitat loss highlights the success of conservation efforts and the species’ resilience. Their population, once dwindling, now flourishes across much of their historical range, providing a beacon of hope for other endangered species.

The Bald Eagle belongs to the family Accipitridae, within the order Accipitriformes. These birds typically live average lifespan is around 20 years, with the maximum recorded at 38 years..

How to Identify a Bald Eagle

Adult Bald Eagles are unmistakable, with a striking white head and tail that stand out against their dark brown body and wings. Their large yellow bill is hooked, adapted for tearing flesh. Males and females share similar plumage, though females are generally larger, with a wingspan reaching up to 7.5 feet. Juveniles, however, present a different picture. Their plumage is mottled with brown and white, lacking the distinctive head and tail coloration until they reach maturity at about five years of age. These immature eagles can be confused with other large raptors like the Golden Eagle, but the Bald Eagle's bulkier body, larger head, and more massive bill are distinguishing features. In flight, their broad wings are held flat, giving them a plank-like silhouette, unlike the Golden Eagle's V-shape. When perched, Bald Eagles exude a commanding presence, often seen atop tall trees or snags near water bodies, scanning for prey with their keen eyesight.

Having trouble telling birds apart? Upload a photo to our bird identification tool for an instant species match.

Bald Eagle Habitat and Range

Preferred Habitat

Bald Eagles primarily inhabit areas near large bodies of open water, such as lakes, rivers, marshes, and coastal regions. They require abundant food supply and old-growth trees or cliffs for nesting. In the southeastern United States, they favor swamps and estuaries, while in the Pacific Northwest, they are often associated with coastal forests. During winter, they migrate to areas with unfrozen waters, particularly along major river systems and reservoirs in the interior of the continent. Though primarily found in rural and wilderness areas, Bald Eagles have increasingly been seen in urban settings where suitable habitats and food sources exist.

Geographic Range

The Bald Eagle's breeding range extends across most of North America, from Alaska and Canada down through the contiguous United States. They are particularly abundant in Alaska, where dense concentrations can be found along the coast and major river systems. During winter, many northern populations migrate southward, reaching as far as northern Mexico. Key migration corridors include the Mississippi River and the Atlantic Flyway. While the species is widespread, certain areas, such as the Chesapeake Bay and the Great Lakes, are recognized hotspots due to their high population densities.

Want to know which birds visit your area? Browse our backyard birds by location guides for region-specific species lists.

What Does the Bald Eagle Eat?

Bald Eagles are opportunistic feeders, with their diet primarily consisting of fish such as salmon and trout. They are adept hunters, using their powerful talons to snatch fish from the water's surface. In addition to live prey, they readily scavenge carrion and hunt birds, mammals, and reptiles when fish are scarce. Seasonal changes influence their diet, with eagles in northern regions relying more on waterfowl and small mammals during winter when fish are less accessible. Their feeding schedule is flexible, adapting to prey availability, but they commonly hunt during daylight hours.

Bald Eagle Behavior and Social Structure

Bald Eagles exhibit a range of behaviors that reflect their adaptability and intelligence. They are primarily solitary, especially during the breeding season, displaying strong territorial instincts. Courtship involves spectacular aerial displays, including cartwheeling, where pairs lock talons and freefall before separating. Outside the breeding season, they may form loose groups, particularly around abundant food sources. They are known for their resourcefulness, often stealing prey from other birds or scavenging. Bald Eagles are diurnal, with activity peaks in early morning and late afternoon. They are alert and responsive to potential threats, often vocalizing with a series of high-pitched whistles or harsh calls.

Bald Eagle Nesting and Reproduction

Bald Eagles construct large nests called aeries, typically built high in sturdy trees or on cliff edges. They use sticks and line the interior with softer materials like grass and feathers. The same nest is often reused and enlarged over many years. Clutch size ranges from one to three eggs, with two being most common. Eggs are incubated for about 35 days, primarily by the female, while the male provides food. Both parents care for the young, which fledge around 10-12 weeks after hatching. Bald Eagles usually produce one brood per year, though in rare instances, a second brood may be attempted.

Bald Eagle Sounds and Vocalizations

The Bald Eagle's vocalizations are surprisingly weak for such a large bird, consisting mainly of a series of high-pitched, whistling calls. These calls range from short, repetitive notes used in communication between mates to longer sequences used in territorial displays. They lack a true song, but their calls can be heard throughout the day, especially near nesting sites. Alarm calls are sharper and more insistent, often compared to the cackling of a gull, used to warn off intruders or potential threats. Dawn and dusk can be particularly vocal times as eagles communicate with each other.

Interesting Facts About the Bald Eagle

1Bald Eagles can fly at speeds of up to 30 miles per hour and dive at speeds of 100 miles per hour to catch prey.
2The largest Bald Eagle nest recorded was nearly 10 feet wide and 20 feet deep, weighing over two tons.
3Bald Eagles have a wingspan that can exceed 7 feet, making them one of the largest birds of prey in North America.
4Despite their name, Bald Eagles aren’t actually bald; 'bald' comes from an old word meaning white-headed.
5The Bald Eagle became the national emblem of the United States in 1782, chosen for its long life, great strength, and majestic appearance.
6Bald Eagles have been known to live up to 30 years in the wild and even longer in captivity, with some reaching 50 years.
7A Bald Eagle's eyesight is 4-8 times stronger than that of a human, allowing them to spot prey from a mile away.

Bald Eagle Conservation Status

Currently, the Bald Eagle holds a status of Least Concern according to the IUCN, with populations increasing across much of its range. This is a significant recovery from the mid-20th century when DDT and habitat destruction severely reduced their numbers. Conservation efforts, including the ban on DDT, legal protection, and habitat restoration, have been pivotal in their resurgence. Ongoing threats include lead poisoning, human disturbance, and habitat loss, but continued conservation initiatives aim to mitigate these risks and maintain stable populations.