World Migratory Bird Day (WMBD) is observed twice a year, on 9 May and 10 October, to promote the conservation of migratory birds. The observance encourages ordinary people to take part through community science, such as recording and sharing bird sightings that help researchers track populations and routes. The theme for 2026 is "Every Bird Counts – Your Observations Matter!", highlighting the value of public participation in monitoring birds.