Washington State Army base a haven for rare butterfly


JOINT BASE LEWIS-MCCHORD, Wash. (AP) — An undeveloped stretch of native prairie in south Puget Sound
offers one of the few habitats in the world where a two-inch colorful checkered butterfly thrives. It
also happens to be the main artillery impact range for Joint Base Lewis-McChord.
The Army’s Stryker combat brigade and other troops regularly practice military maneuvers and live-fire
training on acres of scenic, open grassland where a small population of Taylor’s checkerspot butterfly
feed on nectar of native blooms, mate and lay eggs.
The butterfly’s listing as a federal endangered species last fall “has the potential to cause major
restrictions on training,” said Jeffrey Foster, an ecologist at the military installation.
That has the Army working to boost the numbers of butterflies, once found at more than 70 sites in Puget
Sound, Oregon and British Columbia but are now reduced to 14 sites. The effort mirrors others by the
Army at installations around the country.
From Maryland to Louisiana to Colorado, the Army has been conserving buffer areas around bases to limit
urban development, while also preserving and restoring habitat for rare species such as the red-cockaded
woodpecker and the golden-cheeked warbler.
So far, the program has preserved over 200,000 acres of lands.
At JBLM, 44 miles south of Seattle, the program is helping not only the Taylor’s checkerspot butterfly
but also the streaked horned lark and Mazama pocket gopher.
Last October, the U.S. Fish & Wildlife Service concluded the Taylor’s checkerspot was in danger
of becoming extinct and designated nearly 2,000 acres in Clallam County, Puget Sound and Oregon’s
Willamette Valley as critical habitat for the creature.
The agency said it considered “military training under present conditions a threat to the short-term and
long-term conservation of the Taylor’s checkerspot.” The eight-wheeled, armored Stryker vehicle and
soldier foot traffic can crush larvae and damage plants the butterflies rely on.
The Army has been working with the state, the Center for Natural Lands Management and others to preserve
and restore habitat, both on and off the military installation, so that the butterflies could be
The military and its partners have committed about $35 million and protected about several thousand acres
of land in and around JBLM for multiple species. It will likely take years to increase the butterfly’s
numbers, but those working on the effort are already seeing some success.
Taylor’s checkerspot butterflies are establishing at two of three sites at JBLM and on two other sites
near Olympia where they have been re-introduced.
“We’re in a much better position now than were five years ago,” said Mary Linders, a conservation
biologist with the Washington Department of Fish and Wildlife.
The Army is working with the Center for Natural Lands Management, a non-profit group that manages lands
that are purchased, works with partners who raise the butterflies in captivity, propagates native
prairie plants and prepares sites where the checkerspots can be re-introduced.
Hannah Anderson, rare species program manager at CNLM, said the military’s program helped “protect lands
off the base, restore them to high quality and bring the animals there so we could protect these animals
but also the military’s ability to train.”
On a recent day, Linders and others walked a section of prairie at the artillery impact area to count
adult butterflies and monitor the timing of the flight season.
It is prime season for the butterflies to mate, and their orange and white checkered wings flutter as
they move from one plant to another. They fly in groups and dip into the center of Puget balsamroot,
bright sunflower-like plants that are in full bloom.
Nearby, pock-marked bunkers bear evidence of artillery fire. White stakes mark areas where vehicles must
stay on the road and where soldiers and others are prohibited from digging or camping. Linders points
out a cluster of eggs at the base of a red harsh paintbrush.
“You can see lots and lots of them as we’re walking through here,” she said. “It’s the largest population
left in the checkerspot’s range.”

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