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The site was identified as important in 2005 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 Stork Ciconia nigra	LC	breeding	2000	7 breeding pairs	C6
Lesser Spotted Eagle Clanga pomarina	LC	breeding	2001	15 breeding pairs	B2, C6
Booted Eagle Hieraaetus pennatus	LC	breeding	2001	3-5 breeding pairs	B2, C6
Western Marsh-harrier Circus aeruginosus	LC	resident	2001	3-4 breeding pairs	C6
Montagu's Harrier Circus pygargus	LC	resident	2001	5-7 breeding pairs	C6
Black Kite Milvus migrans	LC	breeding	2001	4-5 breeding pairs	C6
Olive-tree Warbler Hippolais olivetorum	LC	breeding	2005	400 breeding pairs	B2, C6

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2005) may differ.

Year	Protected Area	Designation	% overlap with IBA
2004	Derventski vazvishenia 1	Site of Community Importance (Habitats Directive)	100
2004	Zhdreloto na reka Tundzha	Site of Community Importance (Habitats Directive)	1
2007	Derventski vazvishenia	Special Protection Area (Birds Directive)	100
2012	Nahodishte na Vagenitsova metlichina	Zashtitena Mestnost	<1
2012	Nahodishte na Nadelenolistno velikdenche - Lesovo	Zashtitena Mestnost	<1

Habitat1	Habitat detail	% of IBA
Forest	Broadleaved deciduous woodland	58
Shrubland	Scrub, Sclerophyllous scrub, garrigue and maquis	23
Artificial/Terrestrial	Arable land	12
Grassland	Steppes and dry calcareous grassland, Mesophile grasslands	7

1. IUCN Habitat classification.

Land use	% of IBA
forestry	58
agriculture	42
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Derventski Heights (Bulgaria). Downloaded from https://datazone.birdlife.org/site/factsheet/derventski-heights-iba-bulgaria on 22/11/2024.