A study using 10 years of citizen science data from the Bumblebee Conservation Trust's BeeWalk scheme has found that a variety of targeted conservation approaches are needed to protect UK bumblebee species. The findings are published the British Ecological Society's Journal of Applied Ecology.
source https://www.lifetechnology.com/blogs/life-technology-science-news/multiple-habitats-need-protecting-to-save-uk-bumblebees-finds-10-year-citizen-science-study