Bald Eagle

Where are bald eagles typically found, and what is their preferred habitat?

The bald eagle (Haliaeetus leucocephalus) is the only eagle solely native to North America. While they were once endangered, they are now found throughout every U.S. state except Hawaii, with particularly robust populations in Alaska.¹²

As a sea eagle, the bald eagle prefers habitats located near water, commonly occurring inland along rivers and large lakes where they can easily hunt for fish. They typically build large, sturdy nests—often 1.5 meters or more in width—atop large, isolated trees or rocky pinnacles that provide easy flight access to their hunting grounds. They may also be observed perched in trees, occupying vacant osprey nests, or resting on ice floes near the shore.²³

What is the significance of the bald eagle as a national symbol of the United States?

The bald eagle has served as a prominent symbol of the United States since 1782, when it was incorporated into the Great Seal of the United States. Its inclusion was the result of a multi-year design process involving several committees of the Continental Congress, eventually featuring the eagle holding an olive branch in one talon and a bundle of thirteen arrows in the other, symbolizing a balance between peace and military strength.⁵⁴⁶

Despite its long-standing status as a national icon, the bird’s selection was not universally supported at the time. Benjamin Franklin, who served on the initial design committee, famously objected to the choice, arguing that the bald eagle possessed a “bad moral character” and suggesting the turkey as a more suitable representative for the new nation.⁵

While the eagle was widely considered the national bird for centuries, it did not receive official designation by law until 2024, when Congress passed legislation that was subsequently signed by President Joe Biden.⁵⁴

What conservation efforts have been made to protect bald eagles, and how successful have they been?

The recovery of the bald eagle is considered one of the most successful wildlife conservation stories in history. Following centuries of population decline due to hunting, habitat loss, and the widespread use of the pesticide DDT, the species reached a critical low in the early 1960s, with fewer than 450 nesting pairs remaining in the lower 48 states.⁴⁷

Key conservation efforts that reversed this trend include:

• Legal Protections: The Bald and Golden Eagle Protection Act of 1940 made it illegal to kill or possess eagles, their eggs, or their nests. Later, the Endangered Species Act provided essential funding and habitat safeguards that accelerated recovery.⁴⁷
• Pesticide Regulation: The 1972 ban on DDT was pivotal. Because DDT caused females to lay eggs with shells too thin to survive incubation, its removal allowed reproductive success rates to rebound significantly.⁴⁷

These combined efforts were highly effective. The species was reclassified from endangered to threatened in 1995 and was officially removed from the U.S. list of endangered and threatened species in 2007, by which time the population had grown to approximately 10,000 nesting pairs.⁴⁷

How do bald eagles build their nests, and how large can they become?

Bald eagles construct their nests as large platforms made of sticks, typically positioning them atop a large, isolated tree or a pinnacle of rock located within easy flight of water. These structures are among the largest created by any bird species.⁵⁴

While a typical nest is about 1.5 meters (5 feet) wide, they are often augmented annually by the eagles, meaning that older nests can grow to be nearly twice that size. In some cases, the nests of large eagles can reach diameters of more than 2 meters (6.5 feet) and weigh as much as a ton. Both parents participate in the construction and maintenance of the nest, often adding fresh green material to indicate occupancy.⁴⁵⁸⁹