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Learn how male and female red ovenbirds work together to build nests made out of mud and clay in this video from NATURE: Animal Homes.

Watch the busy hummingbird craft the perfect nest in this video from NATURE: Animal Homes.

Visit Yale’s Peabody Museum of Natural History alongside NATURE’s host and ecologist Chris Morgan to view a sampling of birds’ nests from around the world.

Learn about the mechanical properties of birds’ nests from Yale University structural engineer Corey O’Hern in this video from NATURE: Animal Homes.

This media gallery from NATURE: Invasion of the Killer Whales examines how global warming is impacting arctic ice, polar bears and the permafrost.

Learn how global warming is impacting the arctic region and opening the door to killers whales, a region once off-limits to this marine animal, in this media gallery from NATURE: Invasion of the Killer Whales.

This video from NATURE: Invasion of the Killer Whales describes the arctic region, what animals live there and how they have adapted to this inhospitable environment.

Meet a very unique animal – the sloth – in this video from NATURE: A Sloth Named Velcro.

In this video from NATURE: A Sloth Named Velcro, watch how scientists investigate the natural world with an experiment that measures sloth brain activity to examine just how often wild sloths sleep.