Data Zone
The site was identified as important 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Cape Vulture Gyps coprotheres | VU | resident | - | 60-90 breeding pairs | A1, A4ii |
| Cape Vulture Gyps coprotheres | VU | non-breeding | - | 150-250 individuals | A1, A4ii |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (1998) may differ.
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 | favourable | high | negligible |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | good | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Reference | Actual | Units | % remaining | Result |
| Cape Vulture Gyps coprotheres | 90 | 135 | breeding pairs | 100 | favourable |
| 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%) | favourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Transportation and service corridors | happening now | some of area/population (10-49%) | moderate to rapid deterioration | high |
| Biological resource use | likely in short term (within 4 years) | majority/most of area/population (50-90%) | moderate to rapid deterioration | high |
| Residential and commercial development | likely in short term (within 4 years) | some of area/population (10-49%) | slow but significant deterioration | medium |
| Climate change and severe weather | likely in long term (beyond 4 years) | some of area/population (10-49%) | slow but significant deterioration | medium |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Protected areas | Management plan | Other action | Result |
| Little/none of site covered (<10%) | No management planning has taken place | Very little or no conservation action taking place | negligible |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| 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 23/11/2024.