A rotting carcass being picked away at by vultures may not seem like the ideal place for a photo shoot.

But if you’re hoping to catch gray wolves and other Yellowstone wildlife on camera, then setting up shop by one of their potential meals is a pretty good bet.

And that’s exactly how photographer Ronan Donovan found himself hunched over the body of a decomposing bison in the Yellowstone River in March 2016. Donovan was on assignment covering wolves for National Geographic magazine's Yellowstone issue.

Donovan installed a camera trap (aka carcass cam) near the dead bison, which had drowned during the harsh winter. Donovan did not move the carcass, but did touch it to ensure movement would