a vesper sparrow (pooecetes gramineus ) perched on sagebrush in wyoming

pooecetes gramineus wyoming american animal avian biodiversity biology bird branch brown cap conservation day ecology ecosystem ecotourism environment fauna field grass gray green habitat landscape national park natural nature observation open space ornithology outdoor recreation outdoors perched reddish research sagebrush science small songbird study summer tree united states vegetation vesper sparrow wild wilderness wildlife zoology