Data Zone
The site was identified as internationally important for bird conservation in 2021 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.
Populations meeting IBA criteria ('key species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Elegant Tern Thalasseus elegans | NT | non-breeding (2015) | 40 individuals | B1a |
| Belding's Yellowthroat Geothlypis beldingi | VU | resident (2015) | 35 individuals | A1 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2021. The most recent assessment (2013) is shown below.
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2013 | not assessed | very high | medium |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | unset | unknown | |
| Pressure (threats to the key species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Climate change and severe weather | likely in short term (within 4 years) | whole population/area (>90%) | rapid deterioration (>30% over 3 generations) | very high |
| Natural system modifications | happening now | most of population/area (50–90%) | slow deterioration (1–10% over 3 generations) | high |
| Human intrusions and disturbance | happening now | some of population/area (10–49%) | rapid deterioration (>30% over 3 generations) | high |
| Residential and commercial development | likely in short term (within 4 years) | some of population/area (10–49%) | rapid deterioration (>30% over 3 generations) | high |
| Agricultural expansion and intensification | likely in short term (within 4 years) | some of population/area (10–49%) | rapid deterioration (>30% over 3 generations) | high |
| Response (conservation actions taken for the key species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area of site (>90%) covered by appropriate conservation designation | A management plan exists, but it is out of date or not comprehensive | Some limited conservation initiatives are in place | medium |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1994 | Estero de San Jose | Natural Resources Protection Area (-) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Shrubland | 64 | Scrub |
| Marine Coastal/Supratidal | 19 | |
| Forest | 8 | Gallery & riparian |
| Marine Intertidal | - |
| Land use | % of IBA |
|---|---|
| nature conservation and research | 25 |
| agriculture | 7 |
| urban/industrial/transport | 1 |
| tourism/recreation | - |
Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Estero de San José (Mexico). Downloaded from
https://datazone.birdlife.org/site/factsheet/estero-de-san-josé-iba-mexico on 25/01/2025.