winter wren

Short definition from Wiktionary

Noun

1. 1
   A bird of the species Troglodytes hiemalis, of the coniferous forests of the cooler parts of North America, from British Columbia to the Atlantic coast.
2. 2
   Any of what are now consider separate species, the Eurasian wren (Troglodytes troglodytes) and the Pacific wren (Troglodytes pacificus)