See the best pictures we've been sent by participants in the OPAL Biodiversity Survey. Can you spot your image?

Our experts explain the science behind the OPAL Air Survey and what your lichen data is helping us discover.

Our pick of the best OPAL activities to explore nature during the colder months.

OPAL scientist blog - Join in the discussion

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OPAL partners

The OPAL partnership is led by Imperial College London and includes:

Field Studies Council
Glasgow City of Science
National Museum Wales
Newcastle University
North Wales Wildlife Trust

Plymouth University
Queen's University Belfast
University of Aberdeen
University of Nottingham
University of York


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Big Lottery Fund