A fight between two male cuttlefish includes complex interactions and signals.
Female dragonfies fake their own death to avoid being sexually harassed by unwanted suitor.
River Road in Pennsylvania has been closed by the National Park Service to make way for mating amphibians.
The sound that mice makes is never before heard in any species before.
With penises as long as their bodies, successful mating for these beetles lies on the penile stiffness.
Male Darwin's Bark Spiders, who are 14 times smaller than the gigantic females, routinely salivate onto female arachnid genitalia, pre-, during, and post-copulation.
A new study from McMaster University challenged Charles Darwin's long-standing theory of female choice. Rather than females being drawn to males that have the most vibrant tail feathers or best dance moves, researchers suggest that, once aroused, courtship displays have no bearing on a female's mate preference.
Promiscuous male crickets ultimately reduce their chances of having a child due to sperm competition -- as their partners will also mate with many other males.
Most species avoid crowding but prairie voles seem to be the exception to the rule, say Duke University researchers who found that voles become less anxious and stressed when they have to share their personal space.
Males of a newly discovered species of jumping spiders have been filmed playing peek-a-boo with potential mates. Not all females are receptive to this playful courtship -- females who have mated before will chase off suitors while virgin females hook-up almost immediately.
Among the insects known as burying beetles, females are more attracted to smaller males because they are, you know, chill. That is, they're less likely to get into fights when competing for mates. Despite their increased sex appeal, however, smaller males are not necessarily better parents, researchers reveal in a new study.
Paleontologists suggest recently discoverd foot scrapes across several Colorado outcrops were made by large dinosaurs that competed in dance-offs to woo their mates.
Virgin births, scientifically called parthenogenesis, may be more common among snakes than previously thought. Understanding this sort of reproduction sheds light on the evolutionary history of vertebrates, researchers say.
A 50-year study recently revealed that southern giant petrel seabirds living on the Antarctic island of Signy have experienced substantial population declines and reduced breeding success.
Japanese macaques are exposed to various stressful situations in the wild, including rank fights and mating competitions. Researchers recently took a closer look at how genetics ultimately control the release of stress hormones in these animals.