News and Opinion World Bee Day A collection of articles in Nature Ecology & Evolution highlighting the importance of bees in natural and managed ecosystems. Patrick Goymer May 20, 2019 Share Tweet Share Share A systems approach reveals urban pollinator hotspots and conservation opportunities How to help pollinators in cities Ecological and evolutionary approaches to managing honeybee disease Pesticide reduces bumblebee colony initiation and increases probability of population extinction Honeybee spillover reshuffles pollinator diets and affects plant reproductive success Risks to pollinators and pollination from invasive alien species Evolution of queen cuticular hydrocarbons and worker reproduction in stingless bees Past and potential future effects of habitat fragmentation on structure and stability of plant–pollinator and host–parasitoid networks Community-wide integration of floral colour and scent in a Mediterranean scrubland An invasive social insect overcomes genetic load at the sex locus