The Mourning Warbler (Geothlypis philadelphia) is an abundant migratory insectivore in coffee growing landscapes. It is a great study species, ideal for understanding the needs of migratory landbirds during the non-breeding period, as well as exploring migratory connectivity and carryover effects. It is also a species which is believed to perform important pest control services in coffee and other productive landscapes. This project aims to develop a long-term monitoring program for connected populations of Mourning Warbler in South and North America. We hope to tackle questions about non-breeding ecology, connectivity, habitat quality and survival for this species that primarily uses transformed landscapes during the non-breeding period.