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Location United Kingdom, Scotland
Central coordinates 0o 52.43' West  60o 43.96' North
IBA criteria C7
Area 1,600 ha
Altitude 20 - 120m
Year of IBA assessment 2007

Royal Society for the Protection of Birds

Site description Heathland overlying magnesium silicate rocks, with areas of deep peat, wet flush and mire. Plant communities present include herb-rich sedge grass heath and also species-poor wet and dry heaths. The IBA holds a rich assemblage of breeding birds.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Whimbrel Numenius phaeopus breeding  1994  23 breeding pairs  good  C7  Least Concern 
Arctic Jaeger Stercorarius parasiticus breeding  2001  54 breeding pairs  good  C7  Least Concern 

IBA Monitoring

2007 very high near favourable negligible
Good - based on reliable and complete / representative data

Climate change and severe weather habitat shifting and alteration happening now whole area/population (>90%) very rapid to severe deterioration very high

Stercorarius parasiticus Arctic Jaeger 77 54 breeding pairs 71 near favourable

Some of site covered (10-49%)  Unknown  Not assessed  negligible 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Hill Of Colvadale and Sobul Site of Special Scientific Interest 819 protected area contained by site 819  


IUCN habitat Habitat detail Extent (% of site)
Shrubland Heathland  -
Grassland   -
Wetlands (inland) Fens, transition mires and springs  -

Land use

Land-use Extent (% of site)
agriculture 100%

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Hill of Colvadale and Sobul. Downloaded from on 28/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife