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 ...

A male and female Baltimore oriole feed their young while perched on their hanging nest, which is made of materials like thin twigs, plant cotton and bark strips. Spring is in the air — which means ...

Nest-building isn't just instinct. Birds can learn from others, letting groups within one species develop their own distinctive nest-building... When birds build nests, they're also building a culture ...