Non-breeding fæder Ruffs Philomachus pugnax associate according to sex, not morphology: Capsule Fæders (males that are female look-alikes) associate with males rather than females, at several different spatial scales.
作者:Yvonne I. Verkuil; Joop Jukema; Jennifer A. Gill; Natalia Karlionova; Johannes Melter; Jos C.E.W. Hooijmeijer ; Theunis Piersma
DOI:10.1080/00063650809461529