Curious Kids: how do birds make their nests?

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 acting as nannies for other families may be investing in a nest for their own eggs' future – A new zoology thing for curious kids – 2 New Things

如何向孩子解释为什么不同的鸟类筑的巢不一样? - HOU 的回答- 知乎

Birds – News, Research and Analysis – The Conversation – page 7

Scientists have a new word for birds stealing animal hair

Nests – News, Research and Analysis – The Conversation – page 1

Canada Jays: the real early birds

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Edgerton Eagles Nest Child Care

Hummingbird – News, Research and Analysis – The Conversation – page 1

A guide to bird nests: how, where and why birds make nests - Discover Wildlife