Timed matings of mice are often carried out to obtain offspring of a precise age when required for a study. Timed matings involve housing male and female mice together for a limited time period, ...

Antarctica's second-biggest breeding ground for emperor penguins has been barren since 2016, according to a new study. The breeding pair population has increased at nearby grounds but is still nowhere ...

Young male blue tits are less successful in fathering offspring outside their breeding pair, not because of a lack of experience, but because they are outcompeted by older males, researchers report.

Researchers can now predict the number of offspring a bird will have based on its prolactin and corticosterone levels. Some animals produce more offspring than others. Hormones like prolactin and ...

A female blue tit on her nest. Many females copulate not only with their own social partner, but also with one or more extra-pair sires. Under natural circumstances, these extra-pair males are ...

Get ready for Valentine’s Day by learning how zoo matchmakers use science to “swipe right” for conservation. Mike Bock Male Andean bear Quito (above) has fathered two cubs at the Smithsonian’s ...

In diverse species, individuals coordinate behavior to accomplish shared goals or tasks. Such coordination, however, often occurs selectively, and the contextual information animals use to determine ...

Two African penguin chicks have hatched at a nature reserve in South Africa where conservationists have been working for years to entice the endangered birds to breed. The colony was abandoned more ...

OAK HARBOR ― On any given day, one does not have to travel far to see a bald eagle's nest or an eagle in Ottawa County. Before spring buds bloom, and during their nesting season, bald eagles dot the ...

SINGAPORE: The only pair of breeding peregrine falcons in Singapore in April hatched two chicks that fledged earlier this month, which means they are able to fly and leave the nest. This is the first ...