Butterfly Almost Reaches Endangered Status

Posted April 9, 2016 at 9:28 am by

Island Marble Butterfly - Photo Courtesy of Keith Van Cleve

Island Mar­ble But­ter­fly — Pho­to Cour­tesy of Kei­th Van Cleve

U.S. ​Fish and Wildlife Ser­vice Announces 12-month Find­ing on a Peti­tion to List the Island Mar­ble Butterfly.

​The Ser­vice has deter­mined that the island mar­ble but­ter­fly (Euchloe ausonides insu­lanus) is war­rant­ed for list­ing under the Endan­gered Species Act, but pre­clud­ed by high­er pri­or­i­ty list­ing actions.

The island mar­ble but­ter­fly will be added to the Service’s can­di­date species list. These are species for which the Ser­vice has enough infor­ma­tion regard­ing their bio­log­i­cal sta­tus and threats to pro­pose them as threat­ened or endan­gered, but list­ing is cur­rent­ly pre­clud­ed by high­er pri­or­i­ty list­ing activities.

“Con­ser­va­tion of the island mar­ble but­ter­fly remains a sig­nif­i­cant con­cern for the Ser­vice,” said Wash­ing­ton State Super­vi­sor Eric Rick­er­son. “We will con­tin­ue to close­ly mon­i­tor the but­ter­fly and work with our part­ners to imple­ment con­ser­va­tion mea­sures and address threats to the species.”

The island mar­ble but­ter­fly is a species only found in the San Juan arch­i­pel­ago in San Juan Coun­ty, Wash­ing­ton. The only remain­ing known pop­u­la­tion is cen­tered on Amer­i­can Camp, a part of San Juan Island Nation­al His­tor­i­cal Park on San Juan Island. Threats to the species include: habi­tat loss, direct and inci­den­tal pre­da­tion, and small pop­u­la­tion size. Small pop­u­la­tion size ren­ders the species vul­ner­a­ble to addi­tion­al ran­dom events, such as severe weath­er events, storm surges that destroy habi­tat, or any oth­er event that increas­es mortality.

The Ser­vice has been active­ly work­ing with fed­er­al, state, coun­ty and non-gov­ern­men­tal orga­ni­za­tion part­ners, San Juan Coun­ty Land Bank, San Juan Preser­va­tion Trust, Friends of the San Juans, San Juan Coun­ty Parks, and local landown­ers since 2006 to imple­ment vol­un­tary con­ser­va­tion actions to ensure pro­tec­tion and con­ser­va­tion of the island mar­ble but­ter­fly. Despite ongo­ing con­ser­va­tion efforts, these endeav­ors are cur­rent­ly insuf­fi­cient to improve the sta­tus of the island mar­ble but­ter­fly or ful­ly address cur­rent and future threats to the species.

The Ser­vice will con­tin­ue to active­ly work with part­ners to imple­ment ongo­ing actions as well as devel­op new con­ser­va­tion actions to pro­tect and con­serve the island mar­ble but­ter­fly. The sta­tus of all species on the can­di­date list are reviewed and updat­ed annu­al­ly in the Can­di­date Notice of Review.

To read the Fed­er­al Reg­is­ter notice, or for more infor­ma­tion about man­age­ment activ­i­ties and con­ser­va­tion of the island mar­ble but­ter­fly fol­low this link.

The U.S. Fish and Wildlife Ser­vice works with oth­ers to con­serve, pro­tect, and enhance fish, wildlife, plants, and their habi­tats for the con­tin­u­ing ben­e­fit of the Amer­i­can peo­ple. For more infor­ma­tion, vis­it our web­site, or con­nect with us through Face­book, Twit­ter, Tum­blr, Flickr and YouTube.

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Categories: Environment, Wildlife

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