Can A Cardinal Be Half Male Half Female? Birds Advice
Half-male, half-female rare cardinal photographed in Erie, Pa. region
Once-in-a-lifetime, half-male, half-female cardinal photographed in Pennsylvania
We Helped Scientists Track Birds This Summer. - The New York Times
Rare half-male, half-female cardinal spotted in Pennsylvania
Rare half-male, half-female cardinal spotted in Pennsylvania
Pennsylvania man captures photo of rare half-male, half-female cardinal – KIRO 7 News Seattle
A cardinal that is half male, half female puzzles scientists, delights birdwatchers
Deep-Sea Jelly Reignites Debate on Remote Species Identification
Who's that singing? As fall migration arrives, apps that ID birds by sound have taken off, News
Can A Cardinal Be Half Male Half Female? Birds Advice
Rare cardinal sighting renews interest in work by local researchers
Angel helps Stanford beat Utah in first-round Pac-12 game
Birdwatchers photograph rare 'half-male, half-female' cardinal in Pennsylvania