Pteroset

This release provides a curated passive acoustic monitoring dataset of Neotropical bird vocalizations recorded in Colombia (Puerto Asis, Putumayo; Pijavay, Magdalena) between 2023 and 2025. Audio was collected with autonomous AudioMoth recorders and stored as WAV; recordings were resampled to 48 kHz for downstream analyses, yielding 563 recordings (73.62 hours total). Each recording is paired with expert-generated annotations created in Raven Pro and subsequently harmonized into a COCO-inspired JSON schema for bioacoustics. Annotations are provided as strong labels with explicit temporal boundaries (t_min, t_max) and spectral bounds (f_min, f_max), enabling time frequency localization and event detection tasks. Original soundscape labels were filtered to retain only biophonic bird events, producing 15,372 bird-event annotations at the taxonomic-group level; 6,702 of these additionally include species-level determinations using standardized species codes distributed with the dataset as a separate CSV lookup table. All code used for data processing and technical validation is available at microsoft/PteroSet to ensure reproducibility.