Ringed Storm-petrel Hydrobates hornbyi

Family: Hydrobatidae (Northern Storm-petrels)

Authority: (G.R. Gray, 1864)

Red List Category

Criteria: B2b(iii)

Click here for more information about the Red List categories and criteria

Justification of Red List category
Although this species is not well known, surveys at sea and at one breeding colony suggest that its population size and range are above the thresholds for listing the species as threatened under Criteria B, C or D and we have no evidence to suggest that it is declining at a rate that would approach the threshold for threatened under Criterion A. However, the area of its breeding colonies is small and highly uncertain and the species may be declining as a result of light pollution. For these reasons, the species is listed as Near Threatened.

Population size: 500000-800000 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 2,560,000 km2

Country endemic: no

Realm - Neotropical
IUCN Ecosystem -- Marine biome

Recommended citation
BirdLife International (2024) Species factsheet: Hydrobates hornbyi. Downloaded from https://datazone.birdlife.org/species/factsheet/ringed-storm-petrel-hydrobates-hornbyi on 27/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 27/02/2024.