Data Zone
The site was identified as internationally important for bird conservation in 1998 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 |
|---|---|---|---|---|
| Cape Vulture Gyps coprotheres | VU | resident (-) | 60–90 pairs | A1, A4ii |
| Cape Vulture Gyps coprotheres | VU | non-breeding (-) | 150–250 birds | A1, A4ii |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 1998. The most recent assessment (2011) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2011 | good | high | very low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | good | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Cape Vulture Gyps coprotheres | 135 / 90 (pairs) | 100 | good | ||
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Rocky areas (eg. inland cliffs, mountain peaks) | good (>90%) | good (>90%) | good |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Transportation and service corridors | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Biological resource use | likely in short term (<4 years) | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | high |
| Residential and commercial development | likely in short term (<4 years) | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Climate change and severe weather | likely in long term (>4 years) | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Little/none of area covered (<10%) | No management planning has taken place | Very little or no conservation action taking place | very low |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Forest | 100 | |
| Rocky areas (eg. inland cliffs, mountain peaks) | - | Inselbergs, kopjes & inland cliffs |
| Unknown | - |
| Land use | % of IBA |
|---|---|
| nature conservation and research | 100 |
| unknown | - |
| tourism/recreation | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Colleywobbles Vulture Colony (South Africa). Downloaded from
https://datazone.birdlife.org/site/factsheet/colleywobbles-vulture-colony-iba-south-africa on 26/12/2024.