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Location South Africa, Western Cape
Central coordinates 19o 54.00' East  34o 25.00' South
IBA criteria A1, A2, A3, A4i
Area 300,000 ha
Altitude 0 - 400m
Year of IBA assessment 2001

BirdLife South Africa



Summary Located at the southern tip of the African continent, this large agricultural district stretches from Caledon to Riversdale and encompasses the area south of these two towns, running between the coastal towns of Hermanus and Stilbaai and extending approximately 300 000 hectares. The Overberg holds the large Blue Crane Anthropoides paradiseus populations.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Cape Francolin Pternistis capensis resident  1998  present  A3  Least Concern 
Black Harrier Circus maurus resident  present  A1  Vulnerable 
Blue Crane Anthropoides paradiseus winter  2,914-3,484 individuals  A1, A4i  Vulnerable 
Cape Long-billed Lark Certhilauda curvirostris resident  1998  present  A3  Least Concern 
Cape Bulbul Pycnonotus capensis resident  1998  present  A3  Least Concern 
Orange-breasted Sunbird Nectarinia violacea resident  1998  present  A2, A3  Least Concern 
Cape Sugarbird Promerops cafer resident  1998  present  A2, A3  Least Concern 
Cape Siskin Serinus totta resident  1998  present  A2, A3  Least Concern 

IBA Monitoring

2013 very high not assessed low
unset
Medium - based upon reliable but incomplete / partially representative data

Agricultural expansion and intensification annual & perennial non-timber crops - agro-industry farming happening now whole area/population (>90%) moderate to rapid deterioration very high
Agricultural expansion and intensification annual & perennial non-timber crops - shifting agriculture happening now some of area/population (10-49%) slow but significant deterioration medium
Agricultural expansion and intensification livestock farming and ranching (includes forest grazing) - agro-industry grazing, ranching or farmin happening now majority/most of area/population (50-90%) slow but significant deterioration high
Agricultural expansion and intensification livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming happening now some of area/population (10-49%) slow but significant deterioration medium
Climate change and severe weather drought likely in long term (beyond 4 years) whole area/population (>90%) slow but significant deterioration medium
Climate change and severe weather habitat shifting and alteration likely in long term (beyond 4 years) some of area/population (10-49%) slow but significant deterioration medium
Climate change and severe weather temperature extremes likely in long term (beyond 4 years) whole area/population (>90%) slow but significant deterioration medium
Energy production and mining renewable energy likely in short term (within 4 years) some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance recreational activities happening now some of area/population (10-49%) no or imperceptible deterioration low
Invasive and other problematic species and genes invasive non-native/alien species/diseases - named species happening now some of area/population (10-49%) slow but significant deterioration medium
Invasive and other problematic species and genes problematic native species/diseases - named species happening now some of area/population (10-49%) slow but significant deterioration medium
Natural system modifications dams & water management/use - abstraction of surface water (agricultural use) happening now some of area/population (10-49%) slow but significant deterioration medium
Natural system modifications fire & fire suppression - increase in fire frequency/intensity happening now some of area/population (10-49%) slow but significant deterioration medium
Natural system modifications other ecosystem modifications happening now some of area/population (10-49%) slow but significant deterioration medium
Over-exploitation, persecution and control of species hunting & collecting terrestrial animals - persecution/control happening now some of area/population (10-49%) slow but significant deterioration medium
Pollution agricultural & forestry effluents - herbicides and pesticides happening now majority/most of area/population (50-90%) slow but significant deterioration high
Pollution agricultural & forestry effluents - nutrient loads happening now some of area/population (10-49%) slow but significant deterioration medium
Pollution domestic & urban waste water - type unknown/unrecorded happening now small area/few individuals (<10%) slow but significant deterioration low
Pollution excess energy - noise pollution likely in short term (within 4 years) some of area/population (10-49%) slow but significant deterioration medium
Pollution industrial & military effluents - type unknown/unrecorded happening now small area/few individuals (<10%) slow but significant deterioration low
Residential and commercial development commercial and industrial development happening now some of area/population (10-49%) slow but significant deterioration medium
Residential and commercial development housing and urban areas happening now some of area/population (10-49%) slow but significant deterioration medium
Residential and commercial development tourism and recreation areas happening now some of area/population (10-49%) no or imperceptible deterioration low
Transportation and service corridors roads and railroads happening now small area/few individuals (<10%) slow but significant deterioration low
Transportation and service corridors utility & service lines likely in short term (within 4 years) some of area/population (10-49%) slow but significant deterioration medium

Artificial - terrestrial Arable land  0 0 moderate (70-90%) moderate (70-90%) unfavourable
Shrubland Shrubland - Cape (fynbos)  0 0 very poor (< 40%) poor (40-69%) very unfavourable

Gyps coprotheres Cape Vulture 210 210 individuals 100 favourable
Circus maurus Black Harrier 100 100 individuals 100 favourable
Neotis denhami Denham's Bustard 195 195 individuals 100 favourable
Anthropoides paradiseus Blue Crane 6000 6000 individuals 100 favourable

Little/none of site covered (<10%)  No management plan exists but the management planning process has begun  Some limited conservation initiatives are in place  low 

Habitats

IUCN habitat Habitat detail Extent (% of site)
Grassland   -
Shrubland Shrubland - Cape (fynbos)  -
Artificial - terrestrial Arable land  major

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research 2%
nature conservation and research 20%
tourism/recreation -

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Overberg Wheatbelt. Downloaded from http://www.birdlife.org on 29/11/2014

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