A new study from the Colombian Andes indicates that the amount of nearby forest is as critical as on-farm shade for supporting bird diversity in coffee-growing landscapes. Research published in the Journal of Applied Ecology suggests that for coffee to be truly bird-friendly, conservation efforts must look beyond the farm gate to the surrounding ecosystem. The study was conducted in the Cundinamarca department by ecologists from SELVA and the Smithsonian Migratory Bird Center.
Researchers tracked bird communities across sun coffee farms, shade-grown coffee farms, and forest habitats. The key finding was that forest cover within a 2-kilometer radius positively influenced the presence of all bird types studied, including migratory species and those of conservation concern. Forest-specialist birds were the most sensitive, requiring landscapes with more than 32% forest cover to reach median occupancy and were almost entirely absent from coffee farms, regardless of shade levels, in landscapes with less forest.
These findings have significant implications for the coffee industry and environmental certifications. While dense, diverse shade on farms benefits generalist bird species, it is insufficient for protecting more sensitive forest specialists. The research suggests that certifications like Smithsonian Bird Friendly, which already has rigorous shade standards, may need to evolve to incorporate landscape-level metrics. This reinforces a dual strategy of land-sharing (agroforestry) and land-sparing (forest preservation) as essential for effective, year-round biodiversity conservation in coffee regions.