Galapagos Shearwater Puffinus subalaris


Justification of Red List Category
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Population justification
The population is estimated at c.10,000 pairs (Brooke 2004).

Trend justification
This species is suspected to be in decline as a result of ongoing threats, although the rate of decline has not been quantified.


The species is likely to suffer from reduced food supply during La Niña events, but the level of current and future impact has not been assessed.


Text account compilers
Fjagesund, T., Martin, R., Stuart, A., Hermes, C., Symes, A., Taylor, J.

Recommended citation
BirdLife International (2019) Species factsheet: Puffinus subalaris. Downloaded from on 15/11/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from on 15/11/2019.