A storm brews in the backdrop of this shot from Grand Tetons National Park in northwestern Wyoming. The USGS conducts various biological and ecosystem research activities in Grand Tetons such as helping the National Park Service understand the effects of change in the wolf listing status and where to focus their efforts in wolf management. Photo credit: Big thank you to David Alvarez (davidalvarez76 on Flickr) for sharing this photo with our USGS Science in Action Flickr Group (bit.ly/USGSPhotoPool)