* Redhead Species Account - Cornell Lab of Ornithology* Redhead - Aythya americana USGS Patuxent Bird Identification InfoCenter* Redhead videos, photos & sounds on the Internet Bird Collection* Sound, Sound metadata Macaulay Library
==Gallery====References====External links==*Redhead Species Account - Cornell Lab of Ornithology*Redhead - "Aythya americana" - USGS Patuxent Bird Identification InfoCenter*Sound, Sound metadata Macaulay Library, Cornell Lab of Ornithology