Data Zone
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2024 | Least Concern | |
| 2016 | Least Concern | |
| 2012 | Least Concern | |
| 2009 | Least Concern | |
| 2008 | Least Concern | |
| 2004 | Least Concern | |
| 2000 | Lower Risk/Least Concern | |
| 1994 | Lower Risk/Least Concern | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | medium |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 2,100,000 km2 | |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | suspected | - |
| Generation length | 3.57 years | - | - | - |
Population justification: The global population size has not been quantified, but the species is described as widespread and common (del Hoyo et al. 2005). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 1.8% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.
Trend justification: .
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Fiji | extant | native | yes | |||
| Niue (to New Zealand) | extant | native | yes | |||
| Samoa | extant | native | yes | |||
| Solomon Islands | extant | native | yes | |||
| Tonga | extant | native | yes | |||
| Vanuatu | extant | native | yes | |||
| Wallis and Futuna Islands (to France) | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Fiji | East Kadavu |
| Fiji | Greater Tomaniivi |
| Fiji | Koroyanitu / Vaturu |
| Fiji | Nabukelevu |
| Fiji | Natewa/Tunuloa Peninsula |
| Fiji | Ogea |
| Fiji | Rairaimatuku Highlands |
| Fiji | Rotuma |
| Fiji | Sovi Basin |
| Fiji | Taveuni Highlands |
| Fiji | Viti Levu Southern Highlands |
| Fiji | Wailevu/Dreketi Highlands |
| Niue (to New Zealand) | Huvalu and environs |
| Samoa | Aleipata Marine Protected Area |
| Samoa | Apia Catchments |
| Samoa | Central Savaii Rainforest |
| Samoa | Eastern Upolu Craters |
| Samoa | O Le Pupu-Pu'e National Park |
| Samoa | Uafato-Tiavea Forest |
| Solomon Islands | Vanikoro |
| Tonga | Late |
| Tonga | Tofua and Kao |
| Vanuatu | Ambae |
| Wallis and Futuna Islands (to France) | Alofi |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
| Artificial/Terrestrial | Urban Areas | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Forest | Subtropical/Tropical Moist Montane | suitable | resident |
| Altitude | 0 - 1740 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2024) Species factsheet: Polynesian Triller Lalage maculosa. Downloaded from
https://datazone.birdlife.org/species/factsheet/polynesian-triller-lalage-maculosa on 23/11/2024.
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 23/11/2024.