Cape Rockjumper Chaetops frenatus


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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2021 Near Threatened A2bc+3bc+4bc
2017 Near Threatened A2bc+3bc+4bc
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Near Threatened
1988 Lower Risk/Least Concern
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 105,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 21700-39600 medium estimated 2015
Population trend decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 11-28 - - -
Decline (10 years/3 generation past and future) 11-28 - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 3.8 - - -

Population justification: Lee and Barnard (2016) estimated the population to be 32,551-59,289 individuals. This is roughly equivalent to 21,700-39,526 mature individuals, and rounded here to 21,700-39,600 mature individuals.

Trend justification: The species is thought to be undergoing a moderately rapid decline, as implied by range and reporting rate reductions between Southern African Bird Atlas Projects (SABAP). Lee and Barnard (2016) place the range reduction between SABAPs as 32% (SABAP1 1987-1992; SABAP2 2007-ongoing), with a reporting rate decline of 31%. However, Lee et al. (2017) place the range decline at 25%, but with a reporting rate decline of 53.4%. Over three generations, these rates are equivalent to declines of 11 - 28%. Given that climate change may be having a particular impact on this species (Oswald et al. 2018), this decline is suspected to continue into the future.

Country/territory distribution
Country/Territory Presence Origin Resident Breeding Non-breeding Passage
South Africa extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
South Africa Anysberg Nature Reserve
South Africa Boland Mountains
South Africa Cedarberg - Koue Bokkeveld complex
South Africa Kouga - Baviaanskloof Complex
South Africa Langeberg Mountains
South Africa Outeniqua mountains
South Africa Swartberg mountains

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Rocky areas (eg. inland cliffs, mountain peaks) suitable resident
Shrubland Mediterranean-type Shrubby Vegetation major resident
Shrubland Subtropical/Tropical High Altitude major resident
Altitude 0 - 2300 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Ongoing Whole (>90%) Unknown Unknown
Indirect ecosystem effects, Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Ecosystem degradation

Recommended citation
BirdLife International (2023) Species factsheet: Chaetops frenatus. Downloaded from http://datazone.birdlife.org/species/factsheet/cape-rockjumper-chaetops-frenatus on 06/06/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 06/06/2023.