Common crane - The common crane holds the record for the highest altitude flight, reaching a height of 33,000 feet (10,000 meters) during migration.
Bar-headed goose - The bar-headed goose is a high-altitude migratory bird that is capable of flying over the Himalayas, with reported altitudes of up to 29,000 feet (8,800 meters).
Whooper swan - The whooper swan is another high-altitude migratory bird that has been observed flying at altitudes of up to 27,000 feet (8,200 meters).
Alpine chough - The alpine chough is a species of bird that is found in high-altitude mountain regions, and has been observed flying at altitudes of up to 26,000 feet (8,000 meters).
Bearded vulture - The bearded vulture is a species of bird that is found in high-altitude mountain regions of Europe, Africa, and Asia. They have been observed flying at altitudes of up to 24,000 feet (7,300 meters).
Andean condor - The Andean condor is a large bird of prey found in the Andes mountains of South America, and has been observed flying at altitudes of up to 21,000 feet (6,400 meters).
Bar-tailed godwit - The bar-tailed godwit is a migratory bird that is capable of flying long distances over open ocean, and has been observed flying at altitudes of up to 20,000 feet (6,100 meters).
Mallard duck - The mallard duck is a common species of waterfowl that has been observed flying at altitudes of up to 10,000 feet (3,000 meters) during migration.
Rüppell's vulture - Rüppell's vulture is a species of vulture found in sub-Saharan Africa, and has been observed flying at altitudes of up to 11,000 feet (3,400 meters).
Northern pintail - The northern pintail is a species of duck that is found throughout the Northern Hemisphere, and has been observed flying at altitudes of up to 8,000 feet (2,400 meters) during migration.