Cardinalis cardinalis
The northern cardinal's brilliant red plumage and crest, and its clear whistled song, make it one of North America's most recognized birds. Females are olive with warm red accents and also sing, unusual for songbirds. Both sexes defend territories year-round and often stay paired for life. The range has expanded northward as winters warmed and feeders became common, and it is the state bird of seven US states.