Butterflywatch: UV torches aid monitoring of rare and elusive species

Conservation groups count glow-in-the-dark caterpillars and chrysalises which are hard to spot in daylightNature lovers have been enjoying using UV torches to discover the vivid fluorescent colours of plants and animals at night for a few years now.Now lepidopterists have realised that UV torches provide a highly effective new way to find and count rare and elusive butterflies. Continue reading...