The heaviest bird nest ever discovered weighed more than 2,000kg. It was built by bald eagles. The tiniest nest, built by a bee hummingbird, was just over 2cm wide.

Birds’ nests can come in all shapes and sizes – from the traditional cup nests to those that hang like pendulums from the branches of trees. Building a nest can take hours, days, sometimes even weeks.

The standard cup nest predominates today, but bird nests evolved from a more complex roofed structure. ... thought to represent the evolutionary relations among 281 Australian passerine species.

A nest with a roof may provide some birds with more protection. But bird species that build simpler nests may be more adaptable to changing conditions. By Rebecca Dzombak Many of the bird nests ...

The Golden-headed Cisticola from Australia uses spiderwebs to sew a living canopy out of leaves. Since the bird’s nest is only 20 inches off the ground, the camouflage protects it from predators.

This past April, a Good Samaritan in Australia left a gym class and noticed something strange. A pair of birds stood out in ...

We estimate that today, around 30% of Australian bird nests incorporate human-made materials (primarily plastics). We also noted a steady increase in nest parasites over this period.

HOLLOW TREES AND habitats are important shelter for Australian birds and wildlife and a place to nest in. Loss of these habitats to land clearing and urban development are putting pressure on many ...

A recent review of why some birds use “anthropogenic materials” noted that trash has been found in the nests of 176 different species, on every continent other than Antarctica.

The bird that builds a saliva nest used in a soup considered a delicacy in parts of Asia is believed to have been photographed in Australia for the first time.