When the leaves turn in North America, something remarkable happens overhead: billions of birds take flight, heading south to escape winter’s chill. Some will travel thousands of miles, crossing mountains, forests, and rivers before they finally settle in warmer climates. For many of these species, the Tropical Andes is a vital stopover or wintering ground, and a green corridor threading through some of the most breathtaking landscapes on Earth.
The mountainous spine of the Andes is a lifeline for migrating species. Stretching through Colombia, Ecuador, Peru, and beyond, this region provides habitats ranging from lush cloud forests to high-elevation páramo, offering food and shelter to weary travelers. And, as Owen knows from experience, these same forests hold an incredible secret: the Andes don’t just host the migrants you might see in your own neighborhood at other times of the year, they’re also home to countless species you’ve probably never encountered.
If you’ve watched an American Redstart flit through your garden or a Swainson’s Thrush sing from the trees, you’ve met a long-distance traveler. Known as Neotropical migrants, these birds don’t stay put when temperatures drop. Instead, they head to Mexico, Central America, and the Andes, joining a remarkable procession that links U.S. backyards to remote Andean valleys.
To help trace this journey, Owen has created a Migration Grid on his website, an interactive tool also linked by QR code in his new book, Birds of the Tropical Andes. With a quick scan you can dive into detail, from bird calls and scientific names to conservation status. It’s a way to follow familiar species into unfamiliar territory, and to meet the ones you’ve yet to see.
One common misconception about birding the Andes during migration is that you’ll only see birds you already know. In reality, the region is teeming with unique species found nowhere else. “On my trips to the Andes, I photographed somewhere around 100 new species, what birders call lifers,” Owen explains. That’s the magic of the region: you might set out to look for warblers and thrushes from home, but end up in a world of tanagers, hummingbirds, and antpittas. Imagine catching a glimpse of a Blackburnian Warbler in the canopy, then shifting your lens to a shimmering Violet-tailed Sylph hovering at a bloom.
Migration is a marathon, and like any marathon, birds need places to rest and refuel. The Andes provide critical habitats, but these ecosystems are under pressure from deforestation, agriculture, and climate change. Protecting these routes ensures survival not just for migrants, but also for the wonderful residents that share their forests. Organizations like the American Bird Conservancy and local partners are working to safeguard these key corridors, and you can also help too, in ways that you may not be familiar with, but which are simple to do. Supporting bird-friendly coffee farms for your morning brew, reducing light pollution at home and at work, and planting out bird-friendly habitats using native trees, shrubs and flowers will provide food and shelter. The essential tasks of conserving high-elevation forests to keep these migration routes safe require a lot of resources, time and money, and are made easier by bird- and environment-friendly laws and policies, so using your vote to elect representatives who advocate nature is one of the most effective ways to keep the funds rolling in.
If you’re fortunate enough to visit the Andes during fall migration, head into the cloud forests early in the day when bird activity peaks, and wear layers to be ready for the unpredictable shifts in weather. Keep an eye out for mixed-species flocks, where familiar migrants join resident tanagers, flycatchers, and woodcreepers in dazzling feeding parties.
Migration connects us all. The warbler in your backyard and the hummingbird hovering in a distant Andean valley are part of the same, vast, story, one that spans continents and seasons. Explore Owen’s migration grid to follow those journeys, discover new lifers, and see how the birds you know are linked to one of the richest bird regions on Earth.
