Visual Observation to Identify Sexes in Subspecies of Adult Black Skimmers ( Rynchops niger )

Autor: Vieira, Bianca P., Furness, Robert W., Nager, Ruedi G.
Zdroj: Waterbirds: The International Journal of Waterbird Biology, 2018 Jan 01. 41(2), 166-170.
Databáze: JSTOR Journals