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Endangered Species

A close up of a monarch butterfly that has just had a radio transmitter attached to it. The monarch is gently held in place with transparent paper, and the tiny solar panel of the transmitter is across the top of its thorax.
With Upgraded Transmitters, We Can Now Track Migrating Monarchs Better than Ever
Xerces has been helping to test these new tags for over a year, and we are excited to finally put them into widespread use.
Bombus occidentalis on monarda flower in foreground, with mountains beyond
Four Bees, One Future: Why Saving California’s Bumble Bees Matters to Us All
The Xerces Society, Defenders of Wildlife and the Center for Food Safety asked California in 2018 to give four endangered bumble bees full protection under state law. After years of public input, court battles and scientific review, the California Fish and Game Commission is expected to announce its final decision soon.
Morrison bumble bee nectars on milkweed
Morrison Bumble Bee and Large Marble Butterfly to be Considered for Endangered Species Protection
Last week the U.S. Fish and Wildlife Service (FWS) announced that the Morrsion bumble bee (Bombus morrisoni) and the large marble butterfly (Euchloe ausonides) warrant further consideration for protection under the Endangered Species Act by issuing a positive 90-day finding.