23 August 2014 Last updated at 00:31
By Mark Kinver
Environment reporter, BBC News
A study has found a "considerable richness" of wild bee species in most types of urban habitats.
French researchers recorded almost a third of the nation's 900 species of wild bees living in towns and cities.
Writing in Plos One, they added that 60 species were also found in very urbanised areas in the city of Lyon.
There is widespread concern that wild bee populations in rural areas are being adversely affected by a number of factors, including pesticides.
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