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

Taxonomic note

Pachycephala pectoralis, P. par, P. mentalis, P. vitiensis, P. feminina, P. orioloides, P. fulvotincta and P. teysmanni (del Hoyo and Collar 2016) were previously lumped as P. pectoralis following Christidis & Boles (2008) and Sibley & Monroe (1990, 1993).

 

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	C2a(ii)

Red List history

Year	Category	Criteria
2022	Near Threatened	B1b(iii)+2b(iii); C2a(ii)
2016	Near Threatened	A2c+3c+4c; C2a(ii)
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	low
Land-mass type		Average mass	26 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	990 km2	medium
Area of Occupancy (breeding/resident)	726 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	6000-15000 mature individuals	poor	suspected	2016
Population trend	decreasing	-	inferred	2016-2028
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	4.23 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: This species is noted to be one of the least common of the bird species endemic to Rennell, and seems to occur at lower densities than other members of the complex of species (G. Dutson in litt. 2016). It was found to be present at a low density in 2015 (P. Gregory in litt. 2017) and around Tigoa in October 2019 it was very scarce and hard to locate (P. Gregory in litt. 2019). The population is suspected to number 10,000-19,999 individuals based on a preliminary assessment of known records, descriptions of abundance and range size. This is equivalent to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals.

Trend justification: Rates of logging and habitat degradation on Rennell are particularly high (G. Dutson in litt. 2016), and given its apparent requirement for primary habitats and low density the species is inferred to be declining as a result. In the three generations (12.7 years; Bird et al. 2020) to 2021, remote sensing data indicate that 4-6% of forest was lost in this species' range (Global Forest Watch 2022, using data from Hansen et al. [2013] and methods disclosed therein) although based on losses in 2016-2021 is currently declining at a rate equivalent to 2-4% in three generations. Population declines are thought to be roughly equivalent to the rate of tree cover loss and therefore here placed in the band 1-9% over three generations.

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

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 150 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Rennell Whistler Pachycephala feminina. Downloaded from https://datazone.birdlife.org/species/factsheet/rennell-whistler-pachycephala-feminina 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.