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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | A2acde+3cde+4acde | A2acde+3cde+4acde; C1; D1 |
Year | Category | Criteria |
---|---|---|
2020 | Endangered | A2acde+3cde+4acde |
2016 | Endangered | A2acde+3cde+4acde |
2012 | Endangered | A2acde+3cde+4acde |
2008 | Endangered | A2a,c,d,e; A3c,d,e; A4a,c,d,e |
2006 | Endangered | |
2004 | Endangered | |
2002 | Endangered | |
2000 | Lower Risk/Least Concern | |
1994 | Lower Risk/Least Concern | |
1988 | Near Threatened |
Migratory status | not a migrant | Forest dependency | Does not normally occur in forest |
Land mass type |
Land-mass type - continent |
Average mass | 706 g |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence breeding/resident (km2) | 69,200 | medium |
Number of locations | 11-100 | - |
Severely Fragmented | - |
Value | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 250-999 | medium | estimated | 2020 |
Population trend | Decreasing | medium | estimated | - |
Decline (3 years/1 generation past) | - | - | - | |
Decline (5 years/1 generation past) | - | - | - | |
Decline (10 years/1 generation past) | - | - | - | |
Decline (10 years/3 generation future) | 50-60 | - | - | - |
Decline (10 years/3 generation past and future) | 50-60 | - | - | - |
Number of subpopulations | - | - | - | |
Percentage in largest subpopulation | 1-89 | - | - | - |
Generation length (yrs) | 5.2 | - | - | - |
Population justification: Based on counts on Lake Titicaca in 2003 (Martinez et al. 2006) and adults counted elsewhere in the Titicaca watershed (Engblom et al. 2001), the population was estimated at around 1,600 mature individuals. On Lake Titicaca itself, 2,583 individuals of all ages were counted; combined with smaller numbers elsewhere in the watershed, this represents a higher population than previously assumed. In 2007, 1,254 individuals were counted in the wet season (H. Aranibar-Rojas in litt. 2007). The species is however thought to decline at 50-60% over three generations; thus the population may number c. 600 mature individuals in 2020. To account for uncertainty, the population size is here placed in the band 250-999 mature individuals.
Trend justification: Surveys in the 1970s and 1980s led to population estimates of between 2,000-10,000 individuals, with at least 1,147 on Lake Umayo alone in 1986 (Engblom et al. 2001). Surveys in 2001 found just four individuals on Lake Umayo, and 156 adults on Lake Arapa, whereas 215 adults and 45 young were recorded from 16 lakes in the Peruvian range (Engblom et al. 2001). Counts during 1997 in Bolivia found a total of 100 individuals (Engblom et al. 2001). Further declines were indicated during a brief follow-up survey in 2003 (G. Engblom in litt. 2003), but surveys of Lake Titicaca in 2003 found a total of 2,583 individuals, which was thought likely to be an underestimate of the total population on the lake. In 2007 preliminary census data found 1,254 individuals in the wet season (H. Aranibar-Rojas in litt. 2007). A census on a small section of the Río Laka Jahuira (at Paso Julian) in 2004 found 138 mature individuals, and further surveys are needed along the entire eastern section of the river to confirm the size of this subpopulation (Konter 2006). In 2006, the total population was estimated at 1,600 mature individuals (Martinez et al. 2006). Estimates suggest that the species declined by 15% between 2003 and 2005 (Asociación Armonia 2007). This equates to a decline of 50-60% over three generations. The greatest current threat to the species, bycatch in fishermen's gill-nets, is continuing.
Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
---|---|---|---|---|---|---|
Bolivia | N | Extant | Yes | |||
Peru | N | Extant | Yes |
Country/Territory | IBA Name |
---|---|
Bolivia | Lago Poopó y Río Laka Jahuira |
Bolivia | Lago Titicaca (Sector Boliviano) |
Peru | Laguna Suytococha |
Peru | Laguna Umayo |
Peru | Ramis y Arapa (Lago Titicaca, sector Peruano) |
Peru | Laguna de Chacas |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | major | resident |
Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | major | resident |
Altitude | 3000 - 4300 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Very Rapid Declines | High Impact: 8 | ||||||
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Biological resource use | Gathering terrestrial plants - Unintentional effects (species is not the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Human intrusions & disturbance | Recreational activities | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Oncorhynchus mykiss | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Unspecified species | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Natural system modifications | Dams & water management/use - Abstraction of ground water (commercial use) | Timing | Scope | Severity | Impact | ||||
Future | Minority (<50%) | Unknown | Unknown | ||||||
|
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Pollution | Garbage & solid waste | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Pollution | Industrial & military effluents - Seepage from mining | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
---|---|---|---|---|---|---|
Food - human | - | - | Non-trivial | Recent |
Recommended citation
BirdLife International (2023) Species factsheet: Rollandia microptera. Downloaded from
http://www.birdlife.org on 03/02/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 03/02/2023.