Kamm, Matthew; Kuss, Benjamin. "Glossary". Common Birds of New England, an electronic field guide. Brandeis University. Archived from the original on 12 March 2017. Retrieved 13 March 2017.
illinois.edu
life.illinois.edu
Birdsley, Jeff. "IB 461: Ornithology, External Anatomy"(PDF). School of Integrative Biology, University of Illinois Urbana-Champaign. Archived from the original(PDF) on 29 March 2018. Retrieved 13 March 2017.
Mayntz, Melissa (2017-02-22). "Lores". The Spruce. Archived from the original on 2022-08-19. Retrieved 1 March 2017.
Kamm, Matthew; Kuss, Benjamin. "Glossary". Common Birds of New England, an electronic field guide. Brandeis University. Archived from the original on 12 March 2017. Retrieved 13 March 2017.
Birdsley, Jeff. "IB 461: Ornithology, External Anatomy"(PDF). School of Integrative Biology, University of Illinois Urbana-Champaign. Archived from the original(PDF) on 29 March 2018. Retrieved 13 March 2017.