It eventually happens to a birder, any birder. Whether we begin birding in the backyard, at a local park, or during visits to a wildlife refuge brimming with ducks and geese, at some point, most of us broaden our birding horizons. We see amazing birds in the book or app but their distributions are far from home; in other states, provinces, or even other countries. If you don't live in Costa Rica, Panama, or northern South America, you won't find the Green Thorntail near home.