Data Zone
The site was identified as important 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| White-winged Tern Chlidonias leucopterus | LC | winter | 1995 | 10,000 individuals | A4i |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2001) may differ.
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 unfavourable | 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 unfavourable |
| Forest | - | very poor (< 40%) | very unfavourable |
| Shrubland | - | poor (40-69%) | very unfavourable |
| Wetlands (inland) | moderate (70-90%) | moderate (70-90%) | unfavourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Agricultural expansion and intensification | happening now | some of area/population (10-49%) | moderate to rapid deterioration | high |
| Climate change and severe weather | happening now | whole area/population (>90%) | slow but significant deterioration | high |
| Natural system modifications | happening now | 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%) | 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 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| 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 23/11/2024.