By Randy Zellers
When America’s founding fathers affixed a bald eagle to the Great Seal of the United States in 1782, they likely had no idea they were highlighting what would become one of the greatest wildlife comeback stories of all time.
America’s symbol stood on the brink of extinction in the 1960s, when it was placed on the federal Endangered Species list. At that time, less than 500 nesting pairs of bald eagles were documented throughout the entire United States with no nesting pairs observed in Arkansas. Two of the primary culprits for their decline were the pesticide DDT, causing eggshell thinning in birds that ate DDT-contaminated fish, and lead poisoning as a result of lead shotgun pellets ingested when eagles preyed upon crippled and dead waterfowl. Thanks to tighter regulations on pesticide use and a ban on lead shot in waterfowl hunting, scientists and conservationists have been able to turn the tide on the eagles’ plight, with more than 13,000 breeding pairs estimated in 2007 when the species was officially “delisted” from the Endangered Species Act.
The bald eagle’s recovery hit a major milestone at a local level in 1983, when the first eagle nest since the 1950s was documented on Dale Bumpers White River National Wildlife Refuge. Since that time, the number of nests have gradually increased. Although the AGFC no longer has a formal survey for breeding pairs of eagles in the state, Karen Rowe, AGFC Nongame Bird Program Coordinator, estimates the number to be between 150 and 160.
“It could be higher, but once bald eagles were taken off the federal Endangered and Threatened Species list, the funding devoted to their monitoring had to be shifted to focus on recovering other species of birds that were still experiencing steep declines in the state,” Rowe said. “According to the U.S. Fish and Wildlife Service, which monitors their numbers in the continental U.S., breeding bald eagle populations have only continued to increase since their delisting, so it’s likely that the Arkansas population has followed suit. Considering the original goal for recovery in Arkansas was only 10 breeding pairs of nesting bald eagles, we’re in phenomenal shape.”
Rowe says winter is one of the best times to view bald eagles if one is willing to bundle up and brave the chilly weather. Concentrations of eagles and other raptors travel south just like ducks, shorebirds and other migrating species. As lakes and rivers freeze in the northern states, it cuts off the supply of fish and other marine animals the eagles prey upon. Their other major food source, birds like waterfowl, head south for winter, and the eagles follow the food.
“Anywhere you find flocks of migrating waterfowl, you’re likely to come across bald eagles in winter,” Rowe said. “But the best locations are tied to our large rivers, Army Corps of Engineers reservoirs and seasonally flooded rice fields. As duck seasons wind down, you’ll find quite a few birders take more trips to some of the AGFC’s waterfowl-focused wildlife management areas to enjoy watching the many other species the habitat on these areas attracts, eagles included.”
For folks wanting to get out and take in the sight of eagles perched over the wetlands, Rowe suggests keeping an eye out for superdominant trees along the shorelines or field edges.
“Holla Bend National Wildlife Refuge and DeGray Lake on the west side of the state are two of Arkansas’s most well-known eagle-watching locations, but the Delta hosts hundreds of birds each year, especially along the White and Cache rivers.”
How do you tell an eagle from a hawk or a vulture (incorrectly called a “buzzard” by some Arkansans)? First of all, size is a major factor. An eagle’s wingspan is nearly twice as wide as most hawks and owls, often reaching 7 to 8 feet. Black vultures and turkey vultures have similarly sized wingspans, but they have different flight characteristics than raptors.
“Eagles and hawks soar with their wings extended on a flat horizontal plane,” Rowe said. “Vultures hold their wings in a ‘V’ shape. And the white head and tail of both male and female adult bald eagles is a striking contrast from its brown body that will give it away.”
Rowe says golden eagles, which are similarly sized but not as common as bald eagles in Arkansas, have brown heads and tails and legs covered with feathers down to the feet. Another, often more obvious difference is their beak; the bald eagle has a very large, bright yellow beak, while the golden eagle’s is small and black. Immature bald eagles that have not attained their adult plumage also are predominantly brown with white mottling and are often confused for this lesser-known species.
“Juvenile bald eagles gradually shift toward their adult plumage as they get older and usually have the species’ trademark look by year five,” Rowe said.
Rowe said birders who wish to help track eagle nests can email her at [email protected]. Please be prepared to give exact GPS coordinates for the nest to help biologists make the best use of their follow-up time.
“It’s always great to hear the excitement in someone’s voice when they see an eagle or a nest, but we really need people to make sure that the nest is active with a breeding pair and we really need exact locations to help our monitoring efforts,” Rowe said. “We get hundreds of reports each year, but many can’t be used because we don’t have an exact location of an active nest to document.”
