Migratory birds move in their countless millions across the Americas, Africa and Eurasia each spring and autumn. These epic journeys often take place on broad fronts, but birds also concentrate at bottlenecks where geographical features funnel them over narrow ocean crossings, or where rich feeding opportunities enable them to rest and build up fat reserves before continuing their journeys. This selection of hotspots underscores the importance of conservation action in the way birds see the world: through flyways.
Read more from original source: https://www.birdlife.org/worldwide/news/11-spectacular-bird-migration-bottlenecks-around-world?
