Posted in: All posts, Wildlife and nature Autumn leaf identification quiz: can you identify these 10 trees? by Helen Keating, Content Manager on 12 October 2017 Can you identify these ten UK trees when their leaves are in brilliant colour? Test your knowledge with our autumn leaf quiz and get some top tree facts too. Take part in Nature's Calendar and help track the effects of climate change. What's happening to wildlife near you? Posted in: All posts, Wildlife and nature Share Share this on Facebook Share this on Twitter Share this via Email Why do leaves change colour? Why do leaves change colour and fall off in autumn? We explain why and what triggers leaf fall.Helen Keatingon 12 Oct 2017 Spectacular season Celebrate autumn with our top ideas.on 12 Oct 2017 Love the changing seasons? See our live maps to find out what's happening to wildlife near you.