Mountain bluebird (Sialia currucoides) pair at their nest, Yellowstone National Park, Wyoming, United States of America, North America

travel destination photography vertical mountain bluebird sialia currucoides two animals nest yellowstone national park wyoming animal themes wildlife animals in the wild outdoors full length day tree national park perching male animal female animal blue looking away birds nest hole tree trunk rear view bird usa us united states united states of america north america american north american colour image colour color image color outside travel destinations travel nobody no one no one