- Northwestern Crow Incubating Eggs shows the role of both the female and male during this time.
- For more information on these crows look at Verbeek, N. A. and Robert W. Butler. (1999). Northwestern Crow (Corvus caurinus), The Birds of North America (P. G. Rodewald, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America: https://birdsna.org/Species-Account/bna/species/norcro
DOI: 10.2173/bna.407
