The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.Populations meeting IBA criteria ('trigger species'):
|Species||Current IUCN Red List Category||Season||Year(s)||Population estimate at site||IBA criteria met|
|Bean Goose Anser fabalis||LC||non-breeding||2004||present||A4i|
|Greater White-fronted Goose Anser albifrons||LC||winter||2004||present||A4i|
|White-naped Crane Grus vipio||VU||winter||2004||present||A1, A4i|
|Red-crowned Crane Grus japonensis||VU||winter||2004||present||A1, A4i|
|Eastern Imperial Eagle Aquila heliaca||VU||winter||2004||present||A1|
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2004).
|Protected area (PA)||PA designation||PA area (ha)||Relationship of PA with IBA||Overlap of PA with IBA (ha)|
|Sanctuary of Migratory Birds, Cheorwon||천연기념물||37||protected area overlaps with site||0|
|Pocheon||상수원보호구역||33||protected area overlaps with site||0|
|Dongsong||상수원보호구역||39||protected area overlaps with site||0|
|Cheorwon Basin||Natural Monument||40||protected area contained by site||40|
|Basalt Gorge Along Daegyocheon Stream of Hantangang River||천연기념물||21||protected area contained by site||0|
|Habitat (IUCN level 1)||Habitat detail||Extent (% of site)|
BirdLife International (2023) Important Bird Area factsheet: Cheolwon basin. Downloaded from http://datazone.birdlife.org/site/factsheet/cheolwon-basin-iba-south-korea on 29/11/2023.