large, colorful ruff of feathers or fur around the neck patterned with various colors or a single color may be taller in males than females may be raised when threatened or during courtship may be used to make a loud vocalization
frill which has large, colorful ruff of feathers or fur around the neck frill which has patterned with various colors or a single color frill which may be taller in males than females frill which may be raised when threatened or during courtship frill which may be used to make a loud vocalization