I’ve recently been doing surveys for Marin’s Breeding Bird Atlas project. The basic idea is this: divide the county up into 221 blocks of about 1,500 acres each, recruit skilled volunteer observers to ...

An international team of scientists studied 261 bird species across 69 families. They wanted to understand what comes first: ...

Studies show that in birds, differences in survival and maturation between males and females skew adult sex ratios, which then shape mating systems, parental roles, and competition. Research on ...

You might think that the neotropics are one big mating party, but even in places that stay green and vibrant year-round, ...