Here, we describe methods for using an additional genetic marker (mitochondrial DNA gene NADH dehydrogenase subunit 2, or ND2) for identification of 9 Aythya spp. Gene-specific phylogenetic trees and ...

This unique diving duck has a small body and a relatively large head. The males are colorful and vibrant, with iridescent heads that appear black, purple, or green depending on the light.

DeLuca recalled first noticing a common goldeneye in December 2021, when a couple dozen of the ducks appeared in the middle of the river, diving for food. Throughout that winter, they spread out ...