a western kingbird tyrannus verticalis perched in a tree on the plains

adaptation alpestris animal anthropogenic avian biology bird birding birds birdwatching carbon change climate climatic closeup colorado conservation conservatism distribution ecology emissions environment eremophila extinction gases global greenhouse habitat indicator kingbird microevolution migration modeling natural nature niche ornithology outside perched plains richness science species temperatures threatened tourism tree tyrannus verticalis warmdwellin warming western wild wildlife