Fig. 1From: The use of nocturnal flights for barrier crossing in a diurnally migrating songbirdGlobal Positioning System locations of eleven spring migration tracks of purple martins from 2018 to 2020 during spring migration to three breeding locations (Texas and Florida, USA and Manitoba, Canada) from their South American overwintering grounds. Straight lines connect GPS locations and do not necessarily reflect true migratory pathsBack to article page