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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') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Copper Pheasant Syrmaticus soemmerringii	NT	resident	2003	present	A3
Japanese Night Heron Gorsachius goisagi	VU	breeding	2003	present	A3
Japanese Woodpecker Picus awokera	LC	resident	2003	present	A3
Japanese Pygmy Woodpecker Picoides kizuki	LC	resident	2003	present	A3
Varied Tit Sittiparus varius	LC	resident	2003	present	A3
Japanese Bush-warbler Horornis diphone	LC	resident	2003	present	A3
Brown-headed Thrush Turdus chrysolaus	LC	breeding	2003	present	A3
Blue-and-white Flycatcher Cyanoptila cyanomelana	LC	breeding	2003	present	A3
Narcissus Flycatcher Ficedula narcissina	LC	breeding	2003	present	A3
Japanese Grosbeak Eophona personata	LC	resident	2003	present	A3
Grey Bunting Emberiza variabilis	LC	breeding	2003	present	A3

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Forest	good (> 90%)	poor (40-69%)	unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Climate change and severe weather	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Human intrusions and disturbance	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Invasive and other problematic species and genes	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
Whole area of site (>90%) covered by appropriate conservation designation	Unknown	Some limited conservation initiatives are in place	low

Year	Protected Area	Designation	% overlap with IBA
1969	Hyonosen-Ushiroyama-Nagisan	国定公園	100
1972	Oginosen	都道府県指定鳥獣保護区	14
1972	Ashizu	都道府県指定鳥獣保護区	9
1972	Hyonosen	都道府県指定鳥獣保護区	3
1972	Wakasugi	都道府県指定鳥獣保護区	1
1982	Hyonosen	都道府県指定鳥獣保護区	8
1982	Oginosen	都道府県指定鳥獣保護区	6
1992	Sawagawa	都道府県指定鳥獣保護区	2
2007	Eastern Chugoku Mountains	緑の回廊	23

Habitat1	Habitat detail	% of IBA
Forest		-

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Mount Hyonosen (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/mount-hyonosen-iba-japan on 22/11/2024.