Data for Stable isotope analysis to support information on dietary and foraging ecology in Neotropical birds

This dataset contains raw stable isotope values of carbon (δ¹³C) and nitrogen (δ¹⁵N) measured in feathers of Neotropical birds. A total of 1,330 individual samples were analyzed, representing 138 species across 23 families. Samples were collected from three major Brazilian biomes: Cerrado savanna, Amazon rainforest, and Atlantic Forest.