Foraging bird abundance on canopy trees within shade-coffee farms

Abundance of foraging birds of each species for each observation period. country: country data was collected in (Nicaragua or Colombia); year: year data was collected (2015 or 2016); observer: observer initials; date_format: date of observation; juldate: julian calendar date; observation_num: observation number; treeID_format: individual code to identify trees; observationID: unique identifier; treesp: tree species common name (see paper for species names); time_format: time of observation; bird_sp: bird species common name (Colombia) or code (Nicaragua); num_birds: count of individuals; migratory_insectivore: binary dummy variable for primarily insectivorous migratory species; notes: miscellaneous notes; canopy_volume: canopy volume (meters cubed); scale_volume: scaled canopy volume with mean zer