City Nature Challenge 2027
- When
- Fri 30 Apr 2027 – Sun 16 May 2027 · All day
- Where
- Worldwide, in participating cities
People in cities around the world photograph and record wild plants and animals over four days. The sightings are then identified together until 16 May. Local groups may run walks. What: Citizen-science challenge. By: California Academy of Sciences and Natural History Museum of Los Angeles County, with local partners.