Join scientists in an exciting race against the clock to find as many species as possible in 24 hours.
Known as a BioBlitz, this kind of timed wildlife hunt is a fantastic way to discover more about local wildlife and contribute to valuable scientific research at the same time.
Want to get involved? OPAL is running two BioBlitzes that you can join in this June. All ages and abilities are welcome and you can devote as little or as much time as you wish.
Our first BioBlitz will be at Alexandra Palace in London on 5 June, and the second will be in Mothecombe, Devon on 11 June. The BBC will be filming the Alexandra Palace event.
Find out about our last BioBlitz
We found more than 800 species at our Wembury BioBlitz, including a surprising number of invasive species and a moth that was completely new to the area.
Read what happened when OPAL scientists conducted a BioBlitz in a journalist's back garden.