In spring and autumn, Korea provides good places to rest for many migratory birds that breed in far northern regions of Korea and fly southward for winter.
In general, these birds are known to travel a surprisingly long distance; waders, for example, fly over 10,000km in one season. It is therefore critical for the birds to have stopover sites that provide resting places and forages. Remote islands in the sea and tidal flats along the west coast of the Korean Peninsula are precious stopover sites for those migratory birds.