Data Zone
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | C2a(ii) | A2bcd+3bcd+4bcd; C2a(ii) |
| Year | Category | Criteria |
|---|---|---|
| 2021 | Endangered | C2a(ii) |
| 2016 | Endangered | C2a(ii) |
| 2012 | Endangered | C2a(ii) |
| 2008 | Endangered | C2a(ii) |
| 2006 | Endangered | |
| 2004 | Endangered | |
| 2000 | Vulnerable | |
| 1994 | Lower Risk/Near Threatened | |
| 1988 | Near Threatened |
| Migratory status | full migrant | Forest dependency | low |
| Land-mass type |
shelf island |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 1,050,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 4,470,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 1000-2499 mature individuals | medium | estimated | 2016 |
| Population trend | decreasing | medium | inferred | 2004-2022 |
| Rate of change over the past 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
| Rate of change over the future 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
| Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
| Generation length | 5.8 years | - | - | - |
| Number of subpopulations | 1 | - | - | - |
| Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: The population size was estimated to be 531 breeding pairs in 2016, based on surveys, densities, and areas of potential suitable breeding locations (Rabarisoa et al. 2020). This would roughly equate to 1,062 mature individuals. GEPOMAY (2019) surveyed nearly 200 pairs on Mayotte, and based on Mayotte containing 20% of the breeding population, estimated the number of global pairs at c.1,000, equivalent to 2,000 mature individuals. The population size is therefore placed in the band 1,000-2,499 mature individuals.
Trend justification: This species is inferred to be declining due to ongoing wetland habitat loss and degradation (Kull 2012; D'Urban Jackson et al. 2019). Surveys and census reviews by Rabarisoa et al. (2020) found that the two largest and oldest breeding colonies on Madagascar had declined by c.53% and c.41% between 1993-2016, in addition to the disappearance of previous breeding sites on both Madagascar and Aldabra. The trend of the breeding population on Mayotte may be increasing (Rocamora 2004 in Ndang’ang’a and Sande 2008), however the increase may also be due to improved monitoring efforts (Jeanne et al. 2015 in Rabarisoa et al. 2020). The overall rate of population decline is suspected to fall in the band of 30-49%.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Angola | extant | vagrant | yes | |||
| Burundi | extant | native | yes | |||
| Comoros | extant | native | yes | |||
| Congo, The Democratic Republic of the | extant | native | yes | |||
| Kenya | extant | native | yes | |||
| Madagascar | extant | native | yes | |||
| Malawi | extant | native | yes | |||
| Mayotte (to France) | extant | native | yes | |||
| Mozambique | extant | native | yes | |||
| Réunion (to France) | extant | native | yes | |||
| Rwanda | extant | native | yes | |||
| Seychelles | extant | native | yes | |||
| Somalia | extant | vagrant | yes | |||
| Tanzania | extant | native | yes | |||
| Uganda | extant | native | yes | |||
| Yemen | extant | vagrant | yes | |||
| Zambia | extant | native | yes | |||
| Zimbabwe | extant | native | yes |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Aquatic & Marine | Artificial/Aquatic - Canals and Drainage Channels, Ditches | suitable | breeding |
| Artificial/Aquatic & Marine | Artificial/Aquatic - Ponds (below 8ha) | suitable | breeding |
| Artificial/Terrestrial | Arable Land | suitable | non-breeding |
| Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | suitable | non-breeding |
| Marine Neritic | Estuaries | suitable | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | breeding |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | major | non-breeding |
| Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | major | breeding |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | major | non-breeding |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | major | breeding |
| Altitude | 0 - 1800 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Rapid Declines | Medium Impact: 7 | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Rapid Declines | Medium Impact: 7 | ||||||
|
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| Human intrusions & disturbance | Recreational activities | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Micropterus salmoides | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Unknown | Unknown | ||||||
|
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| Invasive and other problematic species, genes & diseases | Problematic native species/diseases - Ardeola ralloides | Timing | Scope | Severity | Impact | ||||
| Ongoing | Unknown | Unknown | Unknown | ||||||
|
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| Natural system modifications | Dams & water management/use - Abstraction of surface water (agricultural use) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Rapid Declines | Medium Impact: 7 | ||||||
|
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| Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Purpose | Scale |
|---|---|
| Food - human | subsistence, national |
Recommended citation
BirdLife International (2024) Species factsheet: Malagasy Pond Heron Ardeola idae. Downloaded from
https://datazone.birdlife.org/species/factsheet/malagasy-pond-heron-ardeola-idae on 22/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 22/11/2024.