Noisy and quite aggressive grey and white birds seem to have taken ownership of the Pelican Creek parking lot not far from Fishing Bridge in Yellowstone National Park, Wyoming, USA

Noisy and quite aggressive grey and white birds seem to have taken ownership of the Pelican Creek parking lot not far from Fishing Bridge in Yellowstone National Park, Wyoming, USA

Pelican Creek meanders into Lake Yellowstone, Yellowstone National Park, Wyoming, USA