EX
Lord Howe Gerygone Gerygone insularis



Taxonomy

Taxonomic source(s)
Brooks, T. 2000. Extinct species. In: BirdLife International (ed.), Threatened Birds of the World, pp. 701-708. Lynx Edicions and BirdLife International, Barcelona and Cambridge, U.K.
Christidis, L. and Boles, W.E. 2008. Systematics and Taxonomy of Australian Birds. CSIRO Publishing, Collingwood, Australia.
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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
D D D1

Red List history
Year Category Criteria
2024 Extinct
2016 Extinct
2012 Extinct
2008 Extinct
2004 Extinct
2000 Extinct
1994 Extinct
1988 Extinct
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type Average mass -
Range

Estimate Data quality
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 0 mature individuals good estimated -
Population trend - - -
Generation length 2.92 years - - -

Population justification: No extant population remains.

Trend justification: Gerygone insularis was reportedly abundant until the Lord Howe Island was colonised by rats from a shipwreck in 1918. It was almost extinct by 1924 (Hume 2017) though reportedly still heard frequently in 1928 (Sharland 1929). It could not be found on a visit in 1936 (Hindwood 1940), and there are no subsequent records (Recher and Clark 1974).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Australia extinct native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Temperate major resident
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Rattus rattus Timing Scope Severity Impact
Past, Unlikely to Return Whole (>90%) Rapid Declines Past Impact
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Unspecified species Timing Scope Severity Impact
Past, Unlikely to Return Unknown Unknown Past Impact
Stresses
Species mortality

Recommended citation
BirdLife International (2024) Species factsheet: Lord Howe Gerygone Gerygone insularis. Downloaded from https://datazone.birdlife.org/species/factsheet/lord-howe-gerygone-gerygone-insularis 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.