"Evolution is unfathomable." ...

In the thorny acacia trees of the Kalahari Desert, avian construction crews are hard at work. White-browed sparrow weavers, a species of social bird, assemble complex roosts and nests from ...

Maria Cristina Tello-Ramos Neighboring groups of birds within the same species can create very different-looking nests — showing that their nest-building choices aren’t solely controlled by instinct ...

The remarkable baya weaver, a diminutive bird native to India, exemplifies Darwin's theory of natural selection with its ...

Among the thousands of bird species there is great variation in nesting habits: Some nest in burrows, or tree cavities and nest boxes, or mounds of decaying vegetation and so on. Most birds build some ...

The weaver bird tops every expert list of animal architects, and for good reason. Using only its beak and feet, a male weaver bird ties real knots in strips of grass to build a round, hanging nest.

Neighboring groups of birds within the same species can create very different-looking nests — showing that their nest-building choices aren't solely controlled by instinct and the environment. Instead ...