show Abstracthide AbstractThe tropics are the source of most biodiversity, yet inadequate sampling obscures answers to fundamental questions about how this diversity evolves. We leverage sampling assembled over decades of fieldwork to study diversification of the largest tropical bird radiation, suboscine passerines, by collecting sequence data using targeted enrichment of 2,389 genomic regions (2,321 UCEs and 96 exons) from 1,940 individuals of 1,287 species.