A male mountain bluebird deposits nesting material in a nest cavity. This nest cavity was a contended property, with several pairs of species vying for the hole. It was all for naught, though, as the tree blew down almost 2 weeks to the day after I took this photo.
Categories & Keywords
Keywords:2012, bird, bluebird, depositing, male, May, mountain bluebird, National Park, nest cavity, nesting material, Sialia currucoides, spring, wild, Yellowstone