The Arctic Warbler is a small songbird found in the northern regions of Europe and Asia, including the Arctic tundra. It has olive-green upperparts, yellowish underparts, and a pale supercilium. A commonly known fact about the Arctic Warbler is its migratory behavior, traveling long distances between breeding and wintering grounds. A fun fact about this bird is that it has a distinctive trilling song that can be heard during the breeding season.