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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
Black-faced Spoonbill Platalea minor	EN	winter	1993-1997	21-41 individuals	A1, A4i
Chinese Egret Egretta eulophotes	VU	passage	1993-1994	2-3 individuals	A1
Spot-billed Pelican Pelecanus philippensis	NT	non-breeding	1994	4 individuals	A1
Charadrius mongolus	NR	passage	1994	2,000 individuals	A4i
Spoon-billed Sandpiper Calidris pygmaea	CR	passage	1994	7 individuals	A1
Spotted Redshank Tringa erythropus	LC	passage	1994-1996	700-750 individuals	A4i
Spotted Greenshank Tringa guttifer	EN	passage	1994-1996	2-5 individuals	A1
Saunders's Gull Saundersilarus saundersi	VU	winter	1994-2001	104-260 individuals	A1, A4i
A4iii Species group - waterbirds	n/a	passage	1994	30,000 individuals	A4iii

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

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2002. The most recent assessment (2016) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Marine Coastal/Supratidal	-	very poor (< 40%)	very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Human intrusions and disturbance	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Biological resource use	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Natural system modifications	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Transportation and service corridors	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Little/none of site covered (<10%)	No management planning has taken place	Very little or no conservation action taking place	negligible

Year	Protected Area	Designation	% overlap with IBA
2004	Red River Delta	UNESCO-MAB Biosphere Reserve	100

Habitat1	Habitat detail	% of IBA
Artificial/Aquatic & Marine		24
Forest	Mangrove forest (tropical)	21
Marine Intertidal		20
Marine Neritic		20
Marine Coastal/Supratidal		15

1. IUCN Habitat classification.

Land use	% of IBA
fisheries/aquaculture	74
not utilised	20
other	6

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Nghia Hung (Vietnam). Downloaded from https://datazone.birdlife.org/site/factsheet/nghia-hung-iba-vietnam on 22/11/2024.