bioPGH Blog: Baltimore Orioles Phipps Conservatory and Botanical
Migration watch: Orioles are back in Will County
Nearly 3 Billion Birds Gone Birds, Cornell Lab of Ornithology
Similar Species to American Redstart, All About Birds, Cornell Lab
Oriole hybridization is a dead end: study
Baltimore Oriole Identification, All About Birds, Cornell Lab of
Baltimore Oriole Range Map, All About Birds, Cornell Lab of
Baltimore Oriole National Wildlife Federation
Baltimore, Bullock's orioles will retain separate identities
Differences Between Baltimore and Orchard Orioles: An
All About Birds Northeast