Whether you are in a location which experiences a flush of migrating warblers, shorebirds, or hawks in the fall, or are just sitting in your backyard, there are many opportunities to witness the changing of the seasons and the movement of migratory birds south to their wintering grounds. When you have become familiar with the bird species which sing and nest in your area during the northern summer, you may notice that as autumn approaches new bird species start showing up…then move on. It can be puzzling as to what these fall migrants are, as they may be young birds which don’t have their diagnostic adult plumage yet or species such as warblers which are drabber after the breeding season is over. And did you ever wonder where they are going? Although bird field guides usually have a map with color coding for migration and winter, unfortunately these maps often show only part of Mexico and not the other countries in Latin America and the Caribbean where these species winter. However, many online resources will help you to understand the full “range” these birds need to complete their annual life cycle. This cycle is the reason why professional ornithologists must work with countries across the hemisphere to protect these shared species.