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closeIUCN Red List history
| Year | Category |
|---|---|
| 2012 | Least Concern |
| 2009 | Least Concern |
| 2008 | Least Concern |
| 2007 | Least Concern |
| 2004 | Not Recognised |
| 2000 | Not Recognised |
| 1994 | Not Recognised |
| 1988 | Not Recognised |
Species attributes
| Migratory status | full migrant | Forest dependency | Medium |
| Land mass type | Average mass | - |
Distribution
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 3,590,000 | |
| Extent of Occurrence non-breeding (km2) | 3,590,000 | |
| Number of locations | - | |
| Fragmentation | - |
Population & trend
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | Unknown | not applicable | Not Applicable | 0 |
| Population trend | Stable | - | ||
| Number of subpopulations | - | - | - | |
| Largest subpopulation | - | - | - | |
| Generation length (yrs) | 7 | - | - | - |
| Population justification: The global population size has not been quantified, though in Europe, the breeding population is estimated to number 250,000-500,000 breeding pairs, equating to 750,000-1,500,000 individuals (BirdLife International 2004), with Europe forming <5% of the global range. National population estimates include: c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in China; c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Taiwan; c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in Korea; c.100-100,000 breeding pairs and c.50-10,000 individuals on migration in Japan and c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Russia (Brazil 2009). | ||||
| Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats. | ||||
Country/Territory distribution
| Country/Territory | Occurrence status | Extinct | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|
| Australia | Native | No | Yes | ||
| Cambodia | Native | No | Yes | ||
| China (mainland) | Native | No | Yes | Yes | |
| Finland | Native | No | Yes | ||
| Indonesia | Native | No | Yes | Yes | |
| Japan | Native | No | Yes | Yes | |
| Kazakhstan | Native | No | Yes | ||
| Kyrgyzstan | Native | No | Yes | ||
| Laos | Native | No | Yes | ||
| Malaysia | Native | No | Yes | ||
| Micronesia, Federated States of | Native | No | Yes | ||
| Mongolia | Native | No | Yes | ||
| Myanmar | Native | No | Yes | ||
| New Zealand | Native | No | Yes | ||
| North Korea | Native | No | Yes | ||
| Palau | Native | No | Yes | ||
| Papua New Guinea | Native | No | Yes | ||
| Philippines | Native | No | Yes | ||
| Russia (Central Asian) | Native | No | Yes | ||
| Russia (European) | Native | No | Yes | ||
| Solomon Islands | Native | No | Yes | ||
| South Korea | Native | No | Yes | ||
| Taiwan (China) | Native | No | Yes | ||
| Tajikistan | Native | No | Yes | ||
| Thailand | Native | No | Yes | ||
| USA | Vagrant | No | |||
| Vietnam | Native | No | Yes | Yes |
Habitats & altitude
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Boreal | major | breeding |
| Forest | Subtropical/Tropical Moist Montane | suitable | breeding |
| Forest | Subtropical/Tropical Moist Montane | suitable | non-breeding |
| Forest | Temperate | major | breeding |
| Shrubland | Temperate | suitable | non-breeding |
| Shrubland | Temperate | suitable | breeding |
| Altitude | 0 - 4500 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2013) Species factsheet: Cuculus optatus. Downloaded from
http://www.birdlife.org on 23/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 23/05/2013.
This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.
| Key facts | |
|---|---|
| Current IUCN Red List category | Least Concern |
| Family | Cuculidae (Cuckoos) |
| Species name author | Gould, 1845 |
| Population size | Unknown mature individuals |
| Population trend | Stable |
| Distribution size (breeding/resident) | 3,590,000 km2 |
| Country endemic? | No |
| Links to further information | |
| - Summary information on this species | |
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