January 30, 2015 at 01:04PM

@coffeentrees posted a photo:

Biologists with the Yellowstone Grey Wolf Restoration Project in Yellowstone National Park attach GPS collars, take blood samples, and collect other data as they care for sedated wolves from the Mollies pack in the park’s Pelican Valley. The team’s wolf capture and GPS collaring allows the biologists to integrate knowledge of the animals’ life histories, genetics, and predatory influence on Yellowstone National Park’s dynamic ecosystem. From left to right are Dan Stahler @dstshahler, Erin Stahler @erin.stahler, and Doug Smith. 2015 marks 20 years since the reintroduction of wolves into the Greater Yellowstone Ecosystem. iPhone photo by David Guttenfelder @dguttenfelder on assignment for @natgeo. by natgeo

from Uploads from everyone