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

Taxonomic note
Hydrobates castro (del Hoyo and Collar 2014) has been split into H. castro and H. jabejabe (Handbook of the Birds of the World and BirdLife International 2018). Wallace et al. (2017) provides molecular support for the acceptance of the population of Band-rumped Storm-petrel Hydrobates castro jabejabe on the Cape Verdes as a full species, as indicated by at least two previous studies (cited in del Hoyo and Collar [2014]: 372). A study by Bolton (2007) revealed that the Cape Verde birds differ rather strongly in voice:

'The hot-season Azores calls generally have a simple one- or two-syllable, rising breath note, stressed on the last syllable, that contrasts markedly with the more protracted, four-syllable (rarely five-syllable) breath note of the sympatric cool-season population, stressed on the penultimate syllable. Cape Verde Burrow Calls are typified by extremely infrequent interruptions of the purr phrase, which on occasion may continue for several minutes without a breath note.'

Examination of the sonagrams in Bolton (2007) strongly suggests that Tobias scores on vocal differences would be very high. This and the very consistent molecular evidence points to the recognition of the Cape Verde population as a full species. Bocage (1875) tentatively described the taxon jabe-jabe from Raso, Cape Verdes, on the basis of a single specimen which he distinguished from H. leucorhous (rather than from H. castro) by its stronger and glossier (vs grey-washed matt sooty) black head and back, lack of brown shafts in the white uppertail-coverts, less forked tail, slightly stronger bill, slightly shorter toes and legs. This is unhelpful in establishing whether there are any characters that distinguish jabejabe from castro, but photographs on the internet suggest it has a marginally wider white rump and more contrasting upperwing-coverts.

Taxonomic source(s)
Bocage, J. V. B. 1875. Observações ácerca do ‘Corvo’ do Archipelago de Cabo-Verde. J. Sciencias Mathematicas, Physicas e Naturaes 5 : 113-120.
Bolton, M. 2007. Playback experiments indicate absence of vocal recognition among temporally and geographically separated populations of Madeira Storm-petrels Oceanodroma castro. Ibis 149(2): 255-263.
Handbook of the Birds of the World and BirdLife International. 2018. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 3. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v3_Nov18.zip.
Wallace, S. J., Morris-Pocock, J. A., González-Solís, J., Quillfeldt, P. & Friesen, V. L. 2017. A phylogenetic test of sympatric speciation in the Hydrobatinae (Aves: Procellariiformes). Molec. Phylogen. Evol. 107: 39-47.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2018	Least Concern
2016	Not Recognised
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	53,800,000 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	15500-67500 mature individuals	poor	estimated	2018
Population trend	decreasing	-	suspected	-
Generation length	19.1 years	-	-	-

Population justification: Population estimates from several islands in its breeding range suggests that the overall population size is likely greater than 10,000 mature individuals overall (M. Lecoq in litt. 2018) (c.15,500-67,500), with further areas still to be quantified (M. Lecoq in litt. 2018).

Trend justification: The population is suspected to be in decline owing to predation by invasive species, potential exploitation by humans and habitat degradation.

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

Country/Territory	IBA Name
Cape Verde	Coastal cliffs between Porto Mosquito and Baia do Inferno
Cape Verde	Ilhéus do Rombo

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Marine Coastal/Supratidal	Sea Cliffs and Rocky Offshore Islands	major	breeding
Marine Neritic	Macroalgal/Kelp	suitable	non-breeding
Marine Neritic	Macroalgal/Kelp	suitable	breeding
Marine Neritic	Pelagic	major	non-breeding
Marine Neritic	Pelagic	major	breeding
Marine Neritic	Seagrass (Submerged)	suitable	non-breeding
Marine Neritic	Seagrass (Submerged)	suitable	breeding
Marine Neritic	Subtidal Loose Rock/pebble/gravel	suitable	non-breeding
Marine Neritic	Subtidal Loose Rock/pebble/gravel	suitable	breeding
Marine Neritic	Subtidal Rock and Rocky Reefs	suitable	non-breeding
Marine Neritic	Subtidal Rock and Rocky Reefs	suitable	breeding
Marine Neritic	Subtidal Sandy	suitable	non-breeding
Marine Neritic	Subtidal Sandy	suitable	breeding
Marine Neritic	Subtidal Sandy-Mud	suitable	non-breeding
Marine Neritic	Subtidal Sandy-Mud	suitable	breeding
Marine Oceanic	Epipelagic (0-200m)	major	non-breeding
Marine Oceanic	Epipelagic (0-200m)	major	breeding
Marine Oceanic	Mesopelagic (200-1000m)	major	non-breeding
Marine Oceanic	Mesopelagic (200-1000m)	major	breeding
Rocky areas (eg. inland cliffs, mountain peaks)		major	breeding
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Human intrusions & disturbance	Recreational activities	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Reduced reproductive success
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Rapid Declines		Medium Impact: 7
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Mus musculus	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Reduced reproductive success
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Reduced reproductive success
Pollution	Excess energy - Light pollution	Timing		Scope		Severity		Impact
		Ongoing		Unknown		Unknown		Unknown
		Stresses Species mortality
Residential & commercial development	Tourism & recreation areas	Timing		Scope		Severity		Impact
		Future		Minority (<50%)		Slow, Significant Declines		Low Impact: 3
		Stresses Ecosystem degradation, Ecosystem conversion, Reduced reproductive success

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Recommended citation
BirdLife International (2024) Species factsheet: Cape Verde Storm-petrel Hydrobates jabejabe. Downloaded from https://datazone.birdlife.org/species/factsheet/cape-verde-storm-petrel-hydrobates-jabejabe 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.