In pictures: Celebrating world ecology Kings of colour Celebrating the UK's bright and beautiful native fungi. Cracking scales Crocodiles' iconic scales are the result of physical cracking. Tree Week Celebrating our landscapes and the tree-planting season. Millipede threat Non-native plants affect giant millipede behaviour, study finds. Photo awards Winning images from the Wildlife Photographer of the Year competition. Tiny trackers Dormice that are fitted with miniature microchip tracking devices. Microworlds Plankton images reveal the colourful world beneath the waves. Sex cannibals Cricket-like insects that snack on their interspecies partners. Fake-rpillars Canadian scientists use modelling dough to test caterpillar eyespots. Nature's ark The species Sir David Attenborough would save.