Link to English Wikipedia entry: Thick-billed Raven
Link to German Wikipedia: Erzrabe
Link to French Wikipedia: Corbeau corbivau
Link to EOL.org: Corvus crassirostris
Link to iNaturalist.org: Corvus crassirostris
Links to my pictures: Thick-billed Raven
Binomial Links for Corvus crassirostris on www.guenther-eichhorn.com
Dr. Günther Eichhorn Travel Website
Soaring website