A multiscale analysis of factors influencing Blackpoll Warbler occupancy and abundance during the non-breeding season in eastern Colombia

The dataset includes two survey methods to monitor Blackpoll Warbler
populations and assess habitat structure in tropical ecosystems across
Colombia. The first method involved surveys conducted along 128 transects
(regional-scale data), each 100 meters in length and 50 meters in width,
across multiple sites during two sampling periods (2017 and 2018). The
transects, situated in both uniform habitats (foothill tropical
rainforests and terra firma tropical humid forests) and
transitional/agricultural systems, were surveyed by trained observers
using visual and auditory species identification techniques. Each transect
was surveyed at least twice per season, with multiple repetitions to
reduce biases. The second method, point counts (vegetation and landscape
scale), was conducted across different habitat types in the Meta and
Guaviare regions, with points strategically placed to ensure habitat
homogeneity, at 26 sites using 160 point-count surveys, each within a
30-meter radius. Both transect and point count data were analyzed based on
observer and repetition to determine species presence and absence. This
combined methodology provides a comprehensive understanding of species
distribution and habitat preferences across different landscape scales.