Anesthetize them with carbon dioxide. Sort males from females. Use virgins. By Malia Wollan “Make sure you use flies that haven’t bred before,” says Christina Lim, 28, who spent years breeding and ...

Mama's boys are not always losers. In spotted hyenas, the key to success for a young male is the number of young females present in the clan when he chooses his breeding clan because young females are ...

Most male loggerhead turtles go back to the nesting beaches to breed –- a common behavior among female turtles --, according to a new study. Most male loggerhead turtles go back to the nesting beaches ...

Male-male reproductive competition occurs in many animal societies and can be costly, both through aggression or energy expenditure prior to mating and lost paternity. In most cooperative breeders, ...

A new long-term study led by Sahas Barve, a Peter Buck Fellow at the Smithsonian’s National Museum of Natural History, finds that male acorn woodpeckers breeding polygamously in duos or trios of males ...