- David Attenborough - Narrator: [about competing mating frogs] It's a case of first-come first-serve.
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- David Attenborough - Narrator: This is our planet's hothouse, the jungle, the tropical rainforest. Forests like these occupy only 3% of the land, yet they're home to over half of the world's species. But how do so many different kinds of plants and animals find the space here to live alongside one another?
- David Attenborough - Narrator: There are thought to be nearly a million different types of fungi in the tropics, the vast majority still unknown to science. But one thing's for certain. Without fungi, rainforests could not exist.