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Taxonomic note

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.
Dowsett, R. J.; Forbes-Watson, A. D. 1993. Checklist of birds of the Afrotropical and Malagasy regions. Tauraco Press, Li
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2016	Near Threatened	A2c+3c+4c; C1+2a(i)
2012	Near Threatened	A2c+3c+4c;C1+2a(i)
2008	Near Threatened	A2c; A3c; A4c; C1; C2a(i)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1996	Vulnerable
1994	Vulnerable
1988	Near Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	70,300 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	inferred	2005-2028
Rate of change over the past 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Generation length	7.8 years	-	-	-

Population justification: The population size of this species has not been quantified, but it is described as generally scarce.

Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction.

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

Country/Territory	IBA Name
Kenya	Hell's Gate National Park
Kenya	Lake Elmenteita
Kenya	Lake Naivasha
Kenya	Lake Nakuru National Park
Kenya	Masai Mara
Kenya	South Nguruman
Tanzania	Maswa Game Reserve
Tanzania	Ngorongoro Conservation Area
Tanzania	Serengeti National Park
Tanzania	Yaida Chini

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Savanna	Dry	major	resident
Shrubland	Subtropical/Tropical Dry	major	resident
Altitude	1200 - 2200 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases	Problematic native species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Unknown		Unknown
		Stresses Hybridisation

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Recommended citation
BirdLife International (2024) Species factsheet: Grey-crested Helmetshrike Prionops poliolophus. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-crested-helmetshrike-prionops-poliolophus 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.