Postcopulatory sexual selection is associated with reduced variation in sperm morphology. by Sara Calhim, Simone Immler, Tim R Birkhead

Get full text

Maintenance of sperm variation in a highly promiscuous wild bird. by Sara Calhim, Michael C Double, Nicolas Margraf, Tim R Birkhead, Andrew Cockburn

Get full text

By hook or by crook? Morphometry, competition and cooperation in rodent sperm. by Simone Immler, Harry D M Moore, William G Breed, Tim R Birkhead

Get full text

The anatomy of the bill tip of kiwi and associated somatosensory regions of the brain: comparisons with shorebirds. by Susan J Cunningham, Jeremy R Corfield, Andrew N Iwaniuk, Isabel Castro, Maurice R Alley, Tim R Birkhead, Stuart Parsons

Get full text

Coevolution of male and female genital morphology in waterfowl. by Patricia L R Brennan, Richard O Prum, Kevin G McCracken, Michael D Sorenson, Robert E Wilson, Tim R Birkhead

Get full text