The Bald Eagle is one of the most readily recognizable birds in North America. They are also one of the largest, with the biggest females reaching 13 pounds or more. And, since 1782, the Bald Eagle has been the national bird of the United States. Bald Eagles are also one of the most well known conservation success stories in the world. In the mid-20th century, Bald Eagle populations suffered a steep decline as a result of persecution, habitat loss, and the introduction of a pesticide called DDT. Large predators, like Bald Eagles, ended up with high concentrations of DDT in their bodies, affecting the birds’ ability to lay eggs with properly formed shells. By 1978, only an estimated 400 Bald Eagle pairs remained in the continental U.S.

Under the protection of the Endangered Species Act, and with reintroduction efforts and the ban of the use of DDT, Bald Eagle populations recovered. In 2007, the Bald Eagle was officially removed from the federal Endangered Species list. There are more than 200 known breeding pairs in Pennsylvania, including two nests in the greater Pittsburgh area, at the Hulton Bridge in Harmar and the Keystone Iron & Metal in Hays.

The Bald Eagles at the National Aviary sustained injuries in the wild that would limit their chances of survival in the wild. They have a comfortable home at the National Aviary where their every need is met, and they serve as ambassadors for their species.

The Golden Eagle, named for the golden feathers on its nape, is a resident of the New and Old Worlds, and occurs in a wide variety of open habitats, from desert areas to the edge of the tundra, and from sea-level to high alpine mountain levels. It is one of the largest birds in North America. It generally avoids forested areas, except in the winter, and nests on cliffs, isolated trees, or other structures. The Golden Eagle forages primarily on small to medium-sized mammals. Although not considered to be globally threatened, this species is frequently a victim of shootings and poisonings. Many are killed by collision with power lines and, in certain areas, wind turbines.

A large and powerful eagle of Africa, the Martial Eagle is found in sparse woodlands and other open habitats such as steppes, savannas, and shrublands. Martial Eagles are extremely powerful predators, feeding on medium-sized vertebrates which they catch after stooping from a high soar. Martial Eagles build large stick nests in the fork of a tree, and their young often stay with their parents for an entire year. Despite generally avoiding settled areas, this species is rapidly declining due to poisoning and shooting, habitat loss, and pollution, as well as collisions and electrocution associated with power lines.

The Steller’s Sea Eagle is a fierce, impressive raptor with chocolate-brown plumage and striking white shoulders and tail. With its deep, strongly arched bill and massive yellow feet, it’s no wonder that the Japanese call this bird O-washi (The Great Eagle). At nearly four-feet in length and an average weight of 13-20 pounds, Steller’s Sea Eagles are one of the largest eagle species in the world, outweighing both the Harpy Eagle (Harpia harpyja) and the Philippine Monkey-eating Eagle (Pithocophaga jefferyi), and with a wingspan (up to 6 – 8 feet) second only to its near-cousin the White-tailed Eagle (Haliaeetus albicilla). Not surprisingly, an adult Steller’s Sea Eagle has no natural predators.

The species is vulnerable to changes in its habitat and food supplies, however. This huge eagle needs an equally huge territory, so the Steller’s population (which is not large) is widespread and particularly sensitive to habitat loss due to climate change. Threats to already declining Pacific Salmon populations translate into potential prey shortages during the all-important breeding season.