Migraciòn de las aves, a nivel global. https://vidasilvestreiberica.org/migracion-el-gran-viaje-de-las-aves/
Las migraciones de aves màs largas. https://www.expertoanimal.com/aves-migratorias-24438.html
Flamenco comùn. (Phoenicopterus Roseus). https://www.expertoanimal.com/aves-migratorias-24438.html
Las rutas migratorias màs espectaculares del reino animal. https://www.ngenespanol.com/animales/las-rutas-migratorias-mas-espectaculares-del-reino-animal/
España : uno de los pricipales corredores migratorios del mundo. https://www.nationalgeographic.es/animales/2018/05/espana-uno-de-los-principales-corredores-migratorios-del-mundo-por-su-ubicacion-geografica
Millions of Birds are Migrating Earlier Because of Warning. https://www.scientificamerican.com/article/millions-of-birds-are-migrating-earlier-because-of-warming/
The Basics of Birds Migration : How, Why and Where. https://www.allaboutbirds.org/news/the-basics-how-why-and-where-of-bird-migration/#
Climate Change Takes a Nasty Toll on Birds Migration, Studies Show. https://www.greenmatters.com/news/bird-migration-climate-change
Climate Patterns Thousands of Miles Away Affect US Bird Migration. https://climate.nasa.gov/news/3201/climate-patterns-thousands-of-miles-away-affect-us-bird-migration/
MARY CALVO 