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The site was identified as important in 2002 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
Rufous-throated Partridge Arborophila rufogularis	LC	resident	2000	present	A3
Annamite Crested Argus Rheinardia ocellata	CR	resident	1991-1993	present	A1, A2
Silver Pheasant Lophura nycthemera	LC	resident	2000	present	A3
Pale-capped Pigeon Columba punicea	VU	resident	1993	present	A1
Anorrhinus tickelli	NR	resident	1994	present	A1, A3
Necklaced Barbet Psilopogon auricularis	LC	resident	2000	present	A3
Moustached Barbet Psilopogon incognitus	LC	resident	2000	present	A3
Bay Woodpecker Blythipicus pyrrhotis	LC	resident	2000	present	A3
Maroon Oriole Oriolus traillii	LC	resident	2000	present	A3
Slender-billed Oriole Oriolus tenuirostris	LC	resident	2000	present	A3
Burmese Shrike Lanius collurioides	LC	resident	2000	present	A3
Indochinese Green Magpie Cissa hypoleuca	LC	resident	2000	present	A3
Yellow-cheeked Tit Machlolophus spilonotus	LC	resident	2000	present	A3
Mountain Bulbul Ixos mcclellandii	LC	resident	2000	present	A3
Black Bulbul Hypsipetes leucocephalus	LC	resident	2000	present	A3
Flavescent Bulbul Pycnonotus flavescens	LC	resident	2000	present	A3
White-spectacled Warbler Phylloscopus intermedius	LC	resident	2000	present	A3
Phylloscopus davisoni	NR	resident	2000	present	A3
Pale-footed Bush-warbler Hemitesia pallidipes	LC	resident	2000	present	A3
Aegithalos concinnus	NR	resident	2000	present	A3
Red-billed Scimitar-babbler Pomatorhinus ochraceiceps	LC	resident	2000	present	A3
Rufous-capped Babbler Cyanoderma ruficeps	LC	resident	2000	present	A3
Indochinese Wren-babbler Napothera danjoui	NT	resident	1991-1993	present	A2, A3
Spot-throated Babbler Pellorneum albiventre	LC	resident	2000	present	A3
Mountain Fulvetta Alcippe peracensis	LC	resident	2000	present	A3
Cutia nipalensis	NR	resident	2000	present	A3
Black-hooded Laughingthrush Garrulax milleti	LC	resident	1993	present	A2, A3
Garrulax merulinus	NR	resident	2000	present	A3
White-cheeked Laughingthrush Pterorhinus vassali	LC	resident	1991	present	A2, A3
Collared Laughingthrush Trochalopteron yersini	EN	resident	1991-1993	uncommon	A1, A2, A3
Heterophasia melanoleuca	NR	resident	2000	present	A3
Blue-winged Minla Siva cyanouroptera	LC	resident	2000	present	A3
Yellow-billed Nuthatch Sitta solangiae	NT	resident	1991-1993	present	A2, A3
Myiomela leucurum	NR	resident	2000	present	A3
Slaty-backed Forktail Enicurus schistaceus	LC	resident	2000	present	A3
Streaked Spiderhunter Arachnothera magna	LC	resident	2000	present	A3
Vietnamese Greenfinch Chloris monguilloti	LC	resident	1991-1993	present	A2, A3

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2002).

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Bidoup-Nui Ba	Vườn quốc gia	57,512	protected area contains site	20,000

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Forest	Hill evergreen forest (subtropical), Montane broadleaf evergreen forest (mont temp)	-
Shrubland	Secondary scrub	-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
nature conservation and research	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Bi Dup. Downloaded from http://datazone.birdlife.org/site/factsheet/bi-dup-iba-vietnam on 03/10/2023.