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The site was identified as internationally important for bird conservation 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 List	Season (year/s of estimate)	Size	IBA criteria
Black Stork Ciconia nigra	LC	breeding (2000)	7 pairs	C6
Lesser Spotted Eagle Clanga pomarina	LC	breeding (2001)	15 pairs	B2, C6
Booted Eagle Hieraaetus pennatus	LC	breeding (2001)	3–5 pairs	B2, C6
Western Marsh-harrier Circus aeruginosus	LC	resident (2001)	3–4 pairs	C6
Montagu's Harrier Circus pygargus	LC	resident (2001)	5–7 pairs	C6
Black Kite Milvus migrans	LC	breeding (2001)	4–5 pairs	C6
Olive-tree Warbler Hippolais olivetorum	LC	breeding (2005)	400 pairs	B2, C6

Year	Protected Area	Designation (management category)	% coverage of IBA
2012	Nahodishte na Vagenitsova metlichina	Zashtitena Mestnost (VI)	<1
2012	Nahodishte na Nadelenolistno velikdenche - Lesovo	Zashtitena Mestnost (VI)	<1

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

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 22/12/2024.