BirdLife: The Magazine June 2017 | Page 26
THE SEX ISSUE
FEATHERED FORNICATION
Of polygamy , polyandry , rape , and sperm competition . Welcome to the secret reproductive life of birds . Shocked ? Blame it on natural selection
Tim Birkhead *
BirdLife: The Magazine June 2017 | Page 25
BirdLife: The Magazine June 2017 | Page 27