Plumage brightness, vigilance, escape potential, and predation risk in male and female Eurasian Siskins (Spinus spinus)

Jordi Pascual, Juan Carlos Senar, Jordi Domènech
2014 The AUK: A Quarterly Journal of Ornithology  
doi:10.1642/auk-13-220.1 fatcat:ecjs4wv3hbf4xht3lusc4y2nx4