bird datasets
2 datasets tagged "bird"
Explore Swiss Breeding Bird Survey Data, 1999-2025
Survey visits and recorded species are strongly positively correlated (r²=0.54), alongside patterns for elevation, coordinates and route length.
Grassland Bird Population Trends by Species and Route
Breeding Bird Survey counts cover 16 grassland species across 200+ routes from 1990 to 2016, showing widespread population declines.