(BIRDS/ENDANGERED SPECIES) Washington state bird populations are making a remarkable comeback.
The Washington Fish and Wildlife Commission recently removed bald eagles and peregrine falcons from the state list of “sensitive species,” reflecting the species’ steady recovery since the 1970s when the pesticide DDT (dichloro-diphenyl-trichloroethane) was federally banned.
However, these bird species will continue to be federally protected under the Bald and Golden Eagle Protection Act, the Migratory Bird Treaty Act, and the Lacey Act.
What’s more, the state commission also reclassified American white pelicans from “endangered” to “threatened” status. Despite the population’s rebound in recent years, the birds still remain vulnerable as there is only one breeding colony in the entire state.
Read on to learn more about the significance of these rebounding bird populations. — Global Animal
Yakima Herald, Luke Thompson
While the strength of America’s democracy may be up for debate after a long, contentious election year, one of its most recognizable symbols looks as strong as it’s been in at least half a century.
Bald eagle sightings still generate plenty of excitement from birdwatchers and non-birdwatchers alike, according to Yakima Valley Audubon Society Board of Directors president Kerry Turley. They’ve grown much easier to spot over the last four decades, culminating in the Washington Department of Fish and Wildlife’s decision to officially take bald eagles and peregrine falcons off the state’s endangered list earlier this month.
A nationwide conservation success story held especially true in Washington, where the wildlife department counted 1,334 known territories in 2015. Natural resource scientist Joseph Buchanan noted it’s hard to guess the exact number of eagles with no intensive surveys in recent years, since they don’t need much forest to build their nests.
“The bald eagle population in Washington is very large,” said Buchanan, who co-authored with Kevin Kalasz the wildlife department’s report recommending for de-listing. “All the information that we have indicates that the population is robust and is continuing to increase.”
Long road back
Bald eagles once thrived throughout the continental United States, and a 2007 wildlife department report estimated around 8,800 eagles lived in Washington when white settlers first arrived in the late 1700s.
Although they remained prevalent in Alaska, hunting, loss of habitats and water contaminants from chemicals such as DDT took a huge toll on the birds in the lower 48 states. The U.S. Fish and Wildlife Department said bald eagles hit a low of 400 nesting pairs in 1963, when officials say Washington was one of a few states to still support breeding.
This year’s status report said only 104 nesting pairs lived in Washington as of 1980. Still, the following year, the state was home to an estimated 10 percent of the entire population in the lower 48.
A national ban on the agricultural use of DDT in 1972 marked a key turning point for bald eagles in Washington and throughout the country. Increased conservation efforts and habitat management also played a key role in returning the massive birds of prey to their former glory.
By 1995, an estimated 4,450 breeding pairs nationwide led the U.S. Department of Fish and Wildlife to downgrade bald eagles from endangered to threatened. In 2007, they left the federal list entirely and a year later Washington downgraded them from threatened to sensitive with close to 1,000 nesting pairs and 3,500 to 4,000 eagles in the winter, according to a wildlife department report.
That report noted nearly 3,000 Washington landowners signed management plans from 1986 to 2007, under a state statute no longer valid since eagles were downlisted to sensitive. This year’s status review indicates existing protection measures should still ensure an anticipated increase in human population won’t negatively affect bald eagles, especially since they appear to be adapting to human activity.
The wildlife department’s listing and recovery section manager, Hannah Anderson, said a steady growth of bald eagles in Washington began in the late ‘70s. Their presence also indicates a healthy ecosystem, although the status review notes high levels of lead in prey still causes some problems.
“They’re sort of top-tier and they’re also carrion eaters,” Anderson said. “They provide a good service there.”
At some point she expects to see the bald eagle population level off, although it has already exceeded carrying capacity in certain areas. Observers have seen failed attempts to establish new territories in close proximity to other eagles, according to Buchanan.
The recent delisting won’t remove critical federal protections for bald eagles, which were one of the first put on the precursor to the federal Endangered Species List in 1967. The Bald and Golden Eagle Protection Act became the first to defend the birds from hunters in 1940, and in 1972, they were added to the list of species in the Migratory Bird Treaty Act.
The Lacey Act of 1900 further diminishes the black market with a ban on trafficking in illegal wildlife. Violators can face fines of up to $500,000 or five years in prison if convicted.
Eagles in the Valley
Although the vast majority of Washington’s bald eagles live west of the Cascades, the majestic birds can often be found at certain spots in the Yakima Valley, especially during winter.
Turley, the Audubon Society president, compiles the weekly bird alert noting all species spotted in the area. He said as little as 15 years ago, bald eagles were considered exclusively a “winter visitor” in Yakima County.
Today, they can be found breeding around Granger and in their most popular spot, the Yakima River Valley. Healthier water makes it a prime spot for bald eagles since fish are typically their primary source of food.
“Most of the nests that I’ve seen along the canyons and stuff like that are pretty much where you can see them,” Turley said. “But you can’t get high enough to cause any (damage). As with any nesting bird, as little disruption as you can have around the nest is good.”
Buchanan said the wildlife department’s bald eagle management guidelines help prevent new development from disturbing nests. Other forest practices rules protect nest trees as well.
Those will most often be found near major waterways and large aggregations of waterfowl, although bald eagles’ willingness to scavenge makes it possible for them to survive elsewhere as well. Turley said some in Yakima County live near large herds of cattle where they make a meal out of a cow’s afterbirth.
Reports in 2001 and 2007 estimated up to 80 percent of bald eagles in Washington mid-winter migrated from Alaska and Canada. But Buchanan said he’s not sure if that’s still true and noted while some eagles stay in the state year-round, others migrate to Canada or Alaska for salmon in the summer and fall before returning for winter and nesting in the spring.
Anderson shared the wildlife department’s excitement at the bald eagle’s remarkable recovery, which also led to it being removed from endangered species lists in Oregon and Idaho. Even before the de-listing in Washington, conservation and management began efforts to transition eagle management to the U.S. Fish and Wildlife Service, allowing state officials to focus on other species.
“For the bald eagle, it took two or three decades or more,” Buchanan said. “But with time and with appropriate management and regulations and protections in place to protect the habitat, it is possible to turn around the populations of these species that are not faring very well.”