Most of our understanding about evolutionary changes and the formation of new animal species is based on the historical record. But a relatively new population of barn swallows in Argentina may help ...

Estonia and Austria, two European countries, have named this species their national bird. George Grinnell played a huge role in early conservation. After he became editor of Forest and Stream magazine ...

Swallows infected with parasites move less and in smaller ranges than healthy ones—with detrimental effects on their foraging success and their survival. As a result, infected individuals foraged in ...