VU
Monteiro's Storm-petrel Hydrobates monteiroi



Taxonomy

Taxonomic note
Oceanodroma castro (Sibley and Monroe 1990, 1993) has been split into O. castro and O. monteiroi following Bolton et al. (2008). All Oceanodroma species have since been moved to Hydrobates (del Hoyo and Collar 2014).

Taxonomic source(s)
Bolton, M.; Smith, A. L.; Gómez-Díaz, E.; Friesen, V. L.; Medeiros, R.; Bried, J.; Roscales, J. L.; Furness, R. W. 2008. Monteiro's Storm Petrel Oceanodroma monteiroi: a new species from the Azores. Ibis 150(4): 717-727.
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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - D1+2

Red List history
Year Category Criteria
2018 Vulnerable D1+2
2016 Vulnerable D1+2
2013 Vulnerable D1+2
2012 Vulnerable D1+2
2010 Vulnerable D1; D2
2008 Not Recognised
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 739,000
Extent of Occurrence breeding/resident (km2) 1 medium
Number of locations 4 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 250-999 medium estimated 1999
Population trend Stable poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 16.5 - - -

Population justification: The population was estimated at 300 pairs in 1999 (Bolton et al. 2008). Recently, the Praia islet population size was updated to 178 breeding pairs, resulting in a global population size estimated at 328-378 pairs (Oliveira et al. 2016). Although the estimate for the population other than Praia islet is now a decade old, the population is not thought to have declined since. The Praia population increased in response to the installation of artificial nest boxes. Thus, the population is best placed in the band 250-999 mature individuals. This equates to 375-1,499 individuals in total, rounded here to 350-1,500 individuals.

Trend justification: Although there is no trend data, the population is suspected to be stable. The population may have even increased since the last known population estimate in 1999 owing to an increase in annual productivity following the installation of nest boxes (Bolton et al. 2008, Bried et al. 2009).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Portugal N Extant Yes Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Portugal Graciosa

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands major breeding
Marine Neritic Pelagic major breeding
Marine Neritic Pelagic major non-breeding
Marine Oceanic Epipelagic (0-200m) major non-breeding
Marine Oceanic Epipelagic (0-200m) major breeding
Rocky areas (eg. inland cliffs, mountain peaks) major breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Past, Unlikely to Return Majority (50-90%) Rapid Declines Past Impact
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Named species Timing Scope Severity Impact
Future Majority (50-90%) Rapid Declines Low Impact: 5
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Teira dugesii Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Asio otus Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Problematic native species/diseases - Calonectris borealis Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Competition, Reduced reproductive success
Pollution Excess energy - Light pollution Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Reduced reproductive success, Species mortality
Residential & commercial development Tourism & recreation areas Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species disturbance, Ecosystem degradation, Reduced reproductive success
Transportation & service corridors Shipping lanes Timing Scope Severity Impact
Future Majority (50-90%) Unknown Unknown
Stresses
Ecosystem degradation, Reduced reproductive success, Species mortality

Recommended citation
BirdLife International (2020) Species factsheet: Hydrobates monteiroi. Downloaded from http://www.birdlife.org on 22/10/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/10/2020.