Antilocapra americana
A true symbol of freedom and resilience, the bald eagle is one of the most iconic raptors in Yellowstone and across North America. Chosen as the national bird of the United States in 1782, the eagle inspires awe with its sheer size and commanding presence. With wingspans stretching from 5.5 to 8 feet and a body weight of 8–12 pounds, bald eagles are among the largest birds of prey in the Greater Yellowstone Ecosystem. In Yellowstone and Grand Teton National Parks, these birds soar effortlessly over rivers and lakes, scanning the water for fish. Watching a bald eagle in flight is not only breathtaking but also a reminder of one of the most remarkable conservation success stories in U.S. history.
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About
A Conservation Triumph
Not long ago, the future of the bald eagle was uncertain. Throughout much of the 20th century, bald eagles faced devastating declines due to habitat loss, hunting, and pesticide use. One chemical in particular, DDT, seeped into waterways, contaminating the fish that eagles relied upon. When eagles consumed these fish, the pesticide caused eggshells to become dangerously thin, preventing chicks from hatching successfully. By 1963, only 487 nesting pairs remained in the lower 48 states, a shocking decline from historic numbers. Thankfully, sweeping changes turned the tide. The banning of DDT in the 1970s, combined with the bald eagle’s protection under the Endangered Species Act, allowed populations to recover. By 2007, the bald eagle was officially removed from the endangered species list. Today, they are once again a common sight in Yellowstone, Grand Teton, and across North America—a living symbol of successful wildlife conservation.
Feeding Habits
The bald eagle is a fish specialist, with up to 90% of its diet made up of aquatic prey. They are expert hunters, swooping down to snatch fish from rivers and lakes with their powerful talons. However, bald eagles are also opportunists. They are notorious for stealing from other birds, particularly ospreys, and will chase them until the smaller bird drops its catch. In winter, when fish may be harder to access, bald eagles rely heavily on carrion, scavenging carcasses of bison, elk, and deer to survive the harsh conditions. This adaptability has made them resilient and widespread across diverse habitats. While fish remain their preference, bald eagles will also prey on waterfowl, small mammals, and even reptiles when the opportunity arises.
Breeding and Nests
Bald eagles are monogamous and often mate for life, returning to the same nesting territory year after year. Their nests are extraordinary feats of engineering. Constructed high in tall trees near water, these stick nests can measure 4–6 feet in diameter and up to 3 feet deep, making them some of the largest bird nests in the world. Each year, the pair adds more material to the nest, and over time, some reach over a ton in weight. Females, which are about a third larger than males, lay between one and three eggs in late winter or early spring. Both parents share the responsibility of incubating the eggs and feeding the chicks, which fledge around 12 weeks of age. Juvenile bald eagles look very different from their parents, with mottled brown plumage. They only gain the characteristic white head and tail feathers at about five years old, signaling maturity and readiness to breed.
Where to See Bald Eagles
Yellowstone and Grand Teton National Parks are prime habitats for bald eagles, offering visitors outstanding opportunities to observe them in the wild. Because these birds rely so heavily on fish, they are most often seen near rivers, lakes, and wetlands. Look for them perched in tall cottonwoods or conifers along waterways, scanning the landscape with their extraordinary eyesight. Their soaring flight is unmistakable, often appearing high above open valleys or circling over water in search of prey. Winter brings especially dramatic encounters, as bald eagles gather in larger numbers around carrion and open stretches of river that remain ice-free. Whether perched majestically on a riverside tree or gliding overhead against the backdrop of the Tetons, a bald eagle sighting is always one of the highlights of a Yellowstone adventure.
FAQs
How big is a bald eagle’s wingspan?
Bald eagles have wingspans ranging from 5.5 to 8 feet, making them one of the largest raptors in North America. Their broad wings allow them to soar effortlessly over lakes and valleys in search of prey.
What do bald eagles eat in Yellowstone?
Bald eagles primarily feed on fish, which make up 80–90% of their diet. In Yellowstone, they also scavenge carcasses, steal from ospreys, and occasionally hunt waterfowl or small mammals, especially during the winter months.
Are bald eagles still endangered?
No. Bald eagles were removed from the Endangered Species List in 2007 after a dramatic recovery thanks to habitat protection, federal safeguards, and the banning of DDT. Today, they are once again common across Yellowstone, Grand Teton, and much of North America.
How do you identify a juvenile bald eagle?
Juvenile bald eagles look very different from adults. Instead of the iconic white head and tail, young eagles have mottled brown plumage. They don’t develop the classic adult coloring until they reach about five years old.
Where is the best place to see bald eagles in Yellowstone and Grand Teton?
The best places to spot bald eagles are near rivers, lakes, and wetlands, where fish are abundant. Look for them perched in tall trees or soaring overhead. Winter is especially rewarding, as eagles concentrate around open water and carrion.
Further Reading
Lamar Valley Yellowstone: A Wildlife Watcher’s Paradise
Aug 12, 2025
Tucked into the northeastern corner of Yellowstone National Park lies one of the most wildlife-rich landscapes in North America—Lamar Valley. Often called “America’s Serengeti”, this expansive valley is celebrated for its sweeping views, abundant animal sightings, and exceptional opportunities for nature photography…
Animals of Yellowstone: A Seasonal Wildlife Guide
May 21, 202
From mighty grizzlies to elusive wolves and thundering herds of bison, Yellowstone National Park is a living, breathing showcase of North America’s most iconic wildlife where every season offers a different kind of magic.
Whether you’re planning a summer getaway or a winter escape, this guide reveals what animals you may encounter on your adventures…