Bird songs are plentiful during the spring, but have you ever wondered why do birds sing? Find out the reasons from a bird ...

A male and female cardinal in Michigan represent birds who chose a shorter life filled with offspring to maximize their evolutionary impact. Birds worldwide make strategic decisions about how they ...

Additionally, same-sex and multi-sex mating systems have been documented in birds, meaning that relying just on data representing a male-female binary excludes a broader spectrum of reproductive ...