"snowbirds" in the noun sense
1. fieldfare, snowbird, Turdus pilaris
medium-sized Eurasian thrush seen chiefly in winter
2. snow bunting, snowbird, snowflake, Plectrophenax nivalis
white Arctic bunting
3. junco, snowbird
small North American finch seen chiefly in winter
Source: WordNet® (An amazing lexical database of English)
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