Jack Dykinga / Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.

Jack Dykinga / Murmuration of Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) at sunset, before roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.

Marie Read / Baltimore oriole (Icterus galbula) male perched in pear (Pyrus sp.) blossom, eastern redbud in background, New York, USA. May.

Alan Murphy/ BIA / Altamira Oriole (Icterus gularis), Texas

Alan Murphy/ BIA / Baltimore Oriole (Icterus galbula) males fighting, Texas

Alan Murphy/ BIA / Baltimore Oriole (Icterus galbula) males fighting, Texas

Alan Murphy/ BIA / Orchard Oriole (Icterus spurius) male, Texas

Alan Murphy / Green Jay (Cyanocorax yncas) and Altamira Oriole (Icterus gularis) fighting in flight, Texas

Alan Murphy / Baltimore Oriole (Icterus galbula) male, Texas

Alan Murphy / Orchard Oriole (Icterus spurius) female, Texas

Alan Murphy / Altamira Oriole (Icterus gularis), Texas

Marie Read / Baltimore oriole (Icterus galbula) male singing in spring, perched on Pear blossom (Pyrus sp.) flowers, New York, USA May.