This national geographic fondo de pantalla might contain
gama, cordillera, cadena de montañas, cadena, cadena montañosa, rango, rango de montañas, cadena de montaña, gama de la montaña, and gama de montañas.
Billions of birds migrate annually across the Western Hemisphere… but if we don’t know where they go when they leave their breeding grounds, how can we protect them?