Science

See Them While You Can: Endangered Butterfly Gallery

With so many creatures facing extinction, it’s heartening to read of the Large Blue butterfly’s resurgence. One of six members of the Maculinea family, it was once found throughout England but had vanished by the early 1970s. That’s when University of Oxford ecologist Jeremy Thomas went to study the island’s last remaining population. Before Thomas’ […]
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David Simcox

With so many creatures facing extinction, it's heartening to read of the Large Blue butterfly's resurgence.

One of six members of the Maculinea family, it was once found throughout England but had vanished by the early 1970s. That's when University of Oxford ecologist Jeremy Thomas went to study the island's last remaining population.

Before Thomas' work, scientists knew the outlines of Maculinea arion's fascinating life cycle. After hatching from eggs laid on thyme flowers, the tiny caterpillars fall to the ground and secrete chemicals that make them smell like ants, who promptly mistake them for ant larvae and bring them back to the colony. Under the ants' protection, the caterpillars spend the next 10 months feasting on real ant larvae, then build cocoons near colony entrances. Two weeks later the butterflies wriggle free, walk out and make a winged getaway.

Thomas found that this chemical trickery worked on only a single species of ant, Myrmica sabuleti, and M. sabuleti was also in trouble. Because well-meaning farmers had stopped grazing their livestock in the butterflies' habitat and a virus had depleted wild rabbit populations, hillside grasses grew so long that soil temperatures dropped by several degrees, or just enough to become inhospitable to *M. sabuleti. *

By 1979, the last Large Blue butterfly colony was dead, but Thomas' observations survived. Conservationists reintroduced grazing animals, cleared the hillsides and imported large blue butterflies from Sweden. As of last year, butterfly populations have returned to pre-decline levels.

Thomas' original data was published Monday in Science, and provides a welcome respite from tales of conservation woe. Dozens more butterfly species, including the rest of the *Maculinea *family, are endangered or threatened. A handful are shown in this photo gallery, but most don't even have a picture on the internet. If they disappear, their beauty could be remembered as nothing more than a disembodied name.

Papilio aristodemus ponceanus or the Schaus Swallowtail found only in Florida039s hardwood forests.

Papilio aristodemus ponceanus, or the Schaus Swallowtail, found only in Florida's hardwood forests.

U.S. Fish and Wildlife Service
Icaricia icarioides fenderi or the Mission Blue Butterfly is found only in Oregon039s Willamette Valley.

*Icaricia icarioides fenderi, *or the Mission Blue Butterfly, is found only in Oregon's Willamette Valley.

U.S. Army Corps of Engineers/WikiMedia Commons
Speyeria zerene hippolyta or the Oregon Silverspot.

Speyeria zerene hippolyta, or the Oregon Silverspot.

Walter Siegmund/WikiMedia Commons
Ornithoptera alexandrae or Queen Alexandra039s Birdwing the largest butterfly in the world. A shotgun was used to...

Ornithoptera alexandrae, or Queen Alexandra's Birdwing, the largest butterfly in the world. A shotgun was used to collect the first specimen.

Mark Pellegrini/WikiMedia Commons
Ornithoptera Croesus better known as Wallace039s Golden Birdwing found on the Indonesian island of Maluku.

Ornithoptera Croesus, better known as Wallace's Golden Birdwing, found on the Indonesian island of Maluku.

C.Felder/WikiMedia Commons
Ornithoptera Meridionalis the smallest birdwing butterfly found on Papua New Guinea.

Ornithoptera Meridionalis, the smallest birdwing butterfly, found on Papua New Guinea.

Robert Nash/WikiMedia Commons
Pieris brassicae wollastoni or the Madeiran Large White was declared extinct by experts in 2007 but the International...

Pieris brassicae wollastoni, or the Madeiran Large White, was declared extinct by experts in 2007, but the International Union for the Conservation of Nature has yet to update its listing. In the hope that a few still live in north-facing valleys inside laurasilva forests on the Portuguese island of Madeira, we're including it here.

A. E. Holt White, R. Holt White/WikiMedia Commons

See Also:

*Citation: "Successful Conservation of a Threatened Maculinea Butterfly." By J. A. Thomas, D. J. Simcox, R. T. Clarke. Science, Science, Vol. 324 Issue 5934, June 19, 2009.
*
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