Data Zone
The site was identified as internationally important for bird conservation in 2001 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 |
|---|---|---|---|---|
| White-winged Tern Chlidonias leucopterus | LC | winter (1995) | 10,000 birds | A4i |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2001. The most recent assessment (2017) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2017 | very poor | high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | medium | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Grassland | - | poor (40–69%) | very poor |
| Forest | - | very poor (<40%) | very poor |
| Shrubland | - | poor (40–69%) | very poor |
| Wetlands (inland) | moderate (70–90%) | moderate (70–90%) | poor |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Climate change and severe weather | happening now | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Agricultural expansion and intensification | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Natural system modifications | happening now | 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%) | A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | low |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Forest | 31 | |
| Artificial/Terrestrial | 27 | |
| Wetlands (inland) | 25 | |
| Savanna | 5 | |
| Shrubland | 5 | |
| Unknown | 3 | |
| Grassland | 2 |
| Land use | % of IBA |
|---|---|
| urban/industrial/transport | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lake Victoria: Mara Bay and Masirori swamp (Tanzania). Downloaded from
https://datazone.birdlife.org/site/factsheet/lake-victoria:-mara-bay-and-masirori-swamp-iba-tanzania on 23/12/2024.