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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') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Rufous-throated Partridge Arborophila rufogularis	LC	resident	2000	present	A3
Bar-backed Partridge Arborophila brunneopectus	LC	resident	2000	present	A3
Green-legged Partridge Tropicoperdix chloropus	LC	resident	2000	present	A3
Germain's Peacock-Pheasant Polyplectron germaini	VU	resident	1995	present	A1, A2, A3
Silver Pheasant Lophura nycthemera	LC	resident	2000	present	A3
Blyth's Kingfisher Alcedo hercules	NT	resident	1994-1995	present	A3
Necklaced Barbet Psilopogon auricularis	LC	resident	2000	present	A3
Red-vented Barbet Psilopogon lagrandieri	LC	resident	2000	present	A3
Green-eared Barbet Psilopogon faiostrictus	LC	resident	2000	present	A3
Bay Woodpecker Blythipicus pyrrhotis	LC	resident	2000	present	A3
Rusty-naped Pitta Hydrornis oatesi	LC	resident	2000	present	A3
Blue Pitta Hydrornis cyaneus	LC	resident	2000	present	A3
Maroon Oriole Oriolus traillii	LC	resident	2000	present	A3
Burmese Shrike Lanius collurioides	LC	breeding	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
White-tailed Leaf-warbler Phylloscopus intensior	LC	resident	2000	present	A3
Slaty-bellied Tesia Tesia olivea	LC	resident	2000	present	A3
Aegithalos concinnus	NR	resident	2000	present	A3
Black-headed Parrotbill Paradoxornis margaritae	VU	resident	2000	present	A3
Black-chinned Yuhina Yuhina nigrimenta	LC	resident	2000	present	A3
Red-billed Scimitar-babbler Pomatorhinus ochraceiceps	LC	resident	2000	present	A3
Grey-faced Tit-babbler Mixornis kelleyi	LC	resident	1995	present	A3
Rufous-capped Babbler Cyanoderma ruficeps	LC	resident	2000	present	A3
Indochinese Wren-babbler Napothera danjoui	NT	resident	1994-1995	present	A2, A3
Streaked Wren-babbler Gypsophila brevicaudata	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	1994-1995	present	A2, A3
Garrulax merulinus	NR	resident	2000	present	A3
Pterorhinus chinensis	NR	resident	2000	present	A3
White-cheeked Laughingthrush Pterorhinus vassali	LC	resident	1994-1995	30,410 individuals	A2, A3
Collared Laughingthrush Trochalopteron yersini	EN	resident	1994-1995	uncommon	A1, A2, A3
Heterophasia melanoleuca	NR	resident	2000	present	A3
Rufous-backed Sibia Leioptila annectens	LC	resident	2000	present	A3
Blue-winged Minla Siva cyanouroptera	LC	resident	2000	present	A3
Grey-crowned Crocias Laniellus langbianis	NT	resident	1994-1995	uncommon	A1, A2, A3
Yellow-billed Nuthatch Sitta solangiae	NT	resident	1994-1995	2 breeding pairs	A2, A3
Acridotheres burmannicus	NR	resident	2000	present	A3
Dark-sided Thrush Zoothera marginata	LC	resident	2000	present	A3
Green Cochoa Cochoa viridis	LC	resident	2000	present	A3
Hainan Blue Flycatcher Cyornis hainanus	LC	resident	2000	present	A3
White-tailed Blue Robin Myiomela leucura	LC	resident	2000	present	A3
Slaty-backed Forktail Enicurus schistaceus	LC	resident	2000	present	A3
Greyish-crowned Leafbird Chloropsis lazulina	LC	resident	2000	present	A3
Streaked Spiderhunter Arachnothera magna	LC	resident	2000	present	A3
Aethopyga christinae	NR	resident	2000	present	A3

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2002) may differ.

Year	Protected Area	Designation	% overlap with IBA
2002	Chu Yang Sin	Vườn quốc gia	34

Habitat1	Habitat detail	% of IBA
Forest	Hill evergreen forest (subtropical), Montane broadleaf evergreen forest (mont temp), Pine forest (subtropical)	81
Shrubland	Secondary scrub	19

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	100

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Chu Yang Sin (Vietnam). Downloaded from https://datazone.birdlife.org/site/factsheet/chu-yang-sin-iba-vietnam on 23/11/2024.