With penises as long as their bodies, successful mating for these beetles lies on the penile stiffness.
Male bluebirds benefit from spending a year at home before moving out to build a nest of their own, according to a new study from Cornell University and the Santa Fe Institute. Researchers say the cooperative behavior, or rather helping out around mom's nest, improves the birds' life span and increases genetic diversity of offspring, as females prefer mating with older males.
The Basking Shark Satellite Tagging Project opened up a new finding: The Sea of the Hebrides off the west coast of Scotland may be a hot spot for basking sharks feeding, breeding and migrating in the summer.
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.
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.
Male Brazilian torrent frogs perform interesting dance routines using their toes, feet, hands, legs, arms, vocal sacs, head, and body to attract a mate. Researchers say these diverse visual and audio displays are unlike any others they have observed in frogs.
A dinosaur species known Protoceratops andrewsi sported an ornamental head appendage called a frill that was likely used to attract suitable mates and helped to assert social dominance.
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.
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.
Sexual cannibalism is common among many species. But a new study is challenging the belief that female spiders attack their mates after sex because they can't control their aggressiveness, and instead suggests females are testing males so that they can weed out the weak ones.
An innovative use of tool-making was recently observed in a captive population of greater vasa parrots. It turns out these resourceful birds make tools to grind seashells into nutritious calcium powder.
Giants pandas give birth to more cubs when they are able to choose their mates, a new study revealed. This may help conservationists better protect these endangered animals.
Male crickets emit a high-frequency chirp to startle potential female mates into revealing their location. This, researchers say, likely evolved from males impersonating predatory bats.
Some prairie voles are monogamous, while others seek out multiple mates. In a recent study, researchers from the University of Texas at Austin reveal sexual behavior is largely controlled by genetic differences in the rodents' brains, suggesting natural selection has allowed for both characteristics to co-exist.