Editor's Summary: While the ESA is lauded as one of the country's most powerful tools of environmental protection, the statute may not be strong enough to protect wildlife and habitat in the face of global warming. In this Article, John Kostyack and Dan Rohlf argue that legislative and administrative changes will be needed if the ESA is going to make a real difference in protecting biodiversity from the dangers of climate change. They describe the effects that climate change will have on wildlife and habitat, and relay a list of potential management responses to these effects. They then discuss implementation challenges that climate change will bring, such as difficulties in designating critical habitat for wildlife moving due to warming. Finally, the authors conclude with some policy recommendations, including how to tackle climate change legislation, update the ESA, and institute adaptive management practices.