alien species bats bee-friendly plants bees biodiverse gardens biodiversity biodiversity loss biodiversity summit Nagoya bird nests birds butterflies citizen science climate change common bluebell competition conservation Convention on Biological Diversity Defra ecosystem services endangered species exhibition extinct extinction flowering plants food garden gardening habitat destruction Harlequin ladybird invasive species IYB-UK partners ladybirds marine biodiversity National Trust native species native wildlife natural capital non-native plants non-native species otters phenology pollution red kite reintroduction Rio Earth Summit River Danube RSPB school projects schools Scotland seasonal changes seasons snails species loss survey trees UK biodiversity UK wildlife wildlife-friendly plants Young Darwin Prize