• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	D	D1+2

Red List history

Year	Category	Criteria
2022	Endangered	D
2016	Endangered	D
2012	Endangered	D
2008	Endangered	D1
2004	Endangered
2000	Endangered
1996	Endangered
1994	Endangered
1988	Threatened

Migratory status	not a migrant	Forest dependency	does not normally occur in forest
Land-mass type		Average mass	61 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,500 km2	medium
Area of Occupancy (breeding/resident)	24 km2	good
Number of locations	2	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	170 mature individuals	good	estimated	2020
Population trend	increasing	good	estimated	-
Generation length	5.07 years	-	-	-
Number of subpopulations	2	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification:

In 2021/22, the total wild breeding population numbered about 85 pairs. About 55% of the breeding pairs were on South East Island, and 36% on Waikawa/Portland Island (J. E. Dowding in litt. 2022). These are the only populations that can currently be considered relatively secure and self-sustaining in the long term.

Trend justification: The species' population is now thought to be increasing as reintroductions increase the number of breeding subpopulations on predator free islands (Robertson et al. 2021). Numbers on South East and Mangere Islands are currently stable, and both populations are at carrying capacity. There are currently no pairs breeding on Motutapu Island. The recent increase in the total number of pairs has been entirely the result of the recovery of the population on Waikawa/Portland Island (J.E. Dowding in litt. 2022).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
New Zealand	extant	native	yes

Country/Territory	IBA Name
New Zealand	Mangere

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Grassland	Temperate	major	resident
Marine Intertidal	Rocky Shoreline	major	resident
Marine Intertidal	Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc	suitable	resident
Marine Intertidal	Shingle and/or Pebble Shoreline and/or Beaches	suitable	resident
Marine Intertidal	Tidepools	major	resident
Altitude	0 - 50 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Livestock farming & ranching - Scale Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		No decline		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Whole (>90%)		Unknown		Unknown
		Stresses Indirect ecosystem effects, Ecosystem degradation
Human intrusions & disturbance	Recreational activities	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Causing/Could cause fluctuations		Low Impact: 5
		Stresses Species disturbance
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Past, Likely to Return		Majority (50-90%)		No decline		Past Impact
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Rattus norvegicus	Timing		Scope		Severity		Impact
		Past, Likely to Return		Majority (50-90%)		No decline		Past Impact
		Stresses Reduced reproductive success
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Catharacta skua	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		No decline		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Unspecified species	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		No decline		Low Impact: 5
		Stresses Competition, Species mortality

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Recommended citation
BirdLife International (2024) Species factsheet: Shore Plover Thinornis novaeseelandiae. Downloaded from https://datazone.birdlife.org/species/factsheet/shore-plover-thinornis-novaeseelandiae on 22/12/2024.
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 22/12/2024.