CORVALLIS, Ore. -- About 500 rare butterflies were recently found thriving in the hills west of here, thrilling conservationists who hope the colorful Taylor's checkerspot will fight back from near extinction.
The new colony, along with roughly 1,000 butterflies on nearby private and county park land, account for about three-quarters of all Taylor's checkerspot known to exist. The rest are scattered across 10 sites in western Washington.
"It's extremely exciting, because this is the largest population we have on publicly managed land," said Scott Hoffman Black, executive director of the Xerces Society.
The Portland-based invertebrate conservation group has asked the federal government to declare Taylor's checkerspot an endangered species.
"We found the population where they're already trying to do habitat restoration," he said.
An ecologist found the latest population in some meadows at the county-owned Beazell Memorial Forest north of Philomath late last month.
Significant loss of upland prairie in the Willamette Valley over the past century and a half has nearly wiped out the butterfly, Hoffman Black said.
Scientists estimate less than 1 percent of this important habitat remains in isolated spots threatened by invasive weeds, encroaching fir trees and development.
"As the prairie habitat has gone, the butterfly has gone," Hoffman Black said.
The new population is a pat on the back for Benton County, which has worked to improve habitat and preserve pockets of native prairie. The butterflies feed on wild strawberry, hairy cat's ear, rosy plectritis and other native wildflowers.
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