Why do leaves change colour in autumn?

Autumn leaves from Japanese maple, Acer palmatum. Image: Momiji/CC BY 3.0.

Autumn…the year’s last, loveliest smile.

― William Cullen Bryant (1794–1878)

Why do leaves change their colours in autumn?

Why do some tree leaves become red in autumn?

Why do trees lose their leaves in autumn?

And now, here’s that video that inspired this train of thought

Sources:

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PhD evolutionary ecology/ornithology. Psittacophile. scicomm Forbes, previously Guardian. always Ravenclaw. discarded scientist & writer, now an angry house elf

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𝐆𝐫𝐫π₯π’πœπ’πžπ§π­π’π¬π­, scientist & writer

𝐆𝐫𝐫π₯π’πœπ’πžπ§π­π’π¬π­, scientist & writer

PhD evolutionary ecology/ornithology. Psittacophile. scicomm Forbes, previously Guardian. always Ravenclaw. discarded scientist & writer, now an angry house elf

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