August 15, 2012

Migrating songbird elevated on 'watch' list

The Bicknell’s thrush, which can impede wind project plans, moves closer to possible U.S. protection.

By North Cairn
Staff Writer

(Continued from page 1)

click image to enlarge

Juan Klavins fills a glass capillary tube with blood to be tested for mercury from a Bicknell’s thrush captured in New York. A federal agency says the songbird, which breeds atop mountain peaks in Maine and the Northeast, has one of the most limited breeding and wintering ranges of any bird in North America.

2006 Associated Press file

click image to enlarge

Bicknell's thrush

U.S. Agriculture Department photo

TO LISTEN to the Bicknell's thrush's typical voice and view a map of its habitats, click here.

If renewable energy is restricted to protect this bird's habitat, it might result in further dependence on fossil fuels and continuing emissions from coal plants that could have an equivalent, or worse, impact on the habitat, Payne said.

"We've got to be careful about the policies we implement," he said, adding that he hoped the Fish and Wildlife Service would "take a long, hard look and play this out all the way through."

If the trees in which the thrush lives from May to November disappear, the bird could lose not only its breeding habitat but also some of its food sources, which include insects and berries, said Tom Chapman, field supervisor for the New England Field Office of the Fish and Wildlife Service in Concord, N.H.

In reviewing the bird's status, officials will consider "many, many variables," he said, before deciding whether it should become a candidate for listing as threatened or endangered.

Even if it eventually got listed as threatened or endangered, "it doesn't preclude development" such as logging, tourism or renewable energy, he said. There still would be ways that industry or developers could modify project plans to reduce threats to the bird.

"It's a priority to work with the wind power industry," said Racey. The Fish and Wildlife Service would work with developers to try to reach a satisfactory compromise, but its overarching mandate is to protect stressed species.

For a species to be declared "threatened," it must be likely to become endangered in part or all of its range. And for it to be deemed "endangered," it must be likely to become extinct in part or all of its range.

Once a species is listed as either threatened or endangered, the federal government can take steps to protect habitat or reduce other threats.

Audubon's Duchesne said the Bicknell's thrush is special because it is rarely seen below an altitude of 3,000 feet – and they "sing only at dawn and dusk on mountaintops."

According to the International Bicknell's Thrush Conservation Group, the bird's numbers have declined to about 125,000 globally. Over the past 10 years, U.S. populations have been more stable than those in Canada, which have shown "steep declines ... due to habitat loss," the Fish and Wildlife Service reported.

"That's a very small number for a species," Duchesne said. By comparison, there are "easily millions and millions of robins," he said. Even "puffins are very numerous."

The birds spend the time from May to November breeding in high-altitude fir forests in the northeastern U.S. and southeastern Canada.

For the winter, they migrate to the Caribbean. An estimated 90 percent of the global population is concentrated on the island of Hispaniola – home to the Republic of Haiti and the Dominican Republic – where forested habitats have been reduced significantly, and where predation also has been a problem.

The Bicknell's thrush is one of the land-bird species of highest conservation concern in North America, and the species is threatened by loss of its breeding habitat not just to wind power, but also to "recreational development, telecommunication construction acidic precipitation, mercury deposition and climatic warming," the Bicknell's thrush group has reported.

O'Neil conceded that acid rain, toxic emissions and global warming can contribute to "changing our forests from fir to hardwood," and all contribute to the bird's decline.

"I work for an environmental group that takes all species seriously, from the Bicknell's thrush to homo sapiens," O'Neil said. "And because the laws are so stacked in favor of wind power we gladly accept whatever assistance we can get, even if it comes from a little bird.

"Ask Angus King what he thinks of it," O'Neil said.

King, a U.S. Senate candidate and former Maine governor, faced the issue of the Bicknell's thrush as the head of Independence Wind. It came up during the 2010 regulatory review of a request for a permit from his Brunswick-based firm for a $210 million, 39-turbine project in the Bigelow Preserve.

"And," said O'Neil, "he didn't get it."

Staff Writer North Cairn can be contacted at 791-6325 or at:

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