The CNC global citizen science event was established by the Natural History Museum of Los Angeles and California Academy of Sciences in 2016, bringing cities and regions worldwide together to record as many local species as possible over four days, using the free .
While last year's event brought together 244 cities and 41,000 participants, with 815,000 observations of around 32,000 species, this year's CNC has expanded to include over 400 cities across six continents.
CNC aims to encourage communities to look more closely at their environment, boost wellbeing and mental health, and raise awareness of sustainability and the impact of climate change. In Sussex, this year's CNC builds on the success of 2020's Living Coast exploration by expanding the area of coverage to an 800 km2 area from the River Arun to Eastbourne, including the South Downs National Park. Last year's event saw 1,880 observations of flora and fauna along the area's 'Living Coast', and recorded nearly 600 species.