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Ainley's Storm Petrel - BirdForum Opus

Hydrobates cheimomnestes

Oceanodroma cheimomnestes


17·8–19 cm (7-7½ in)

  • Dark overall plumage
  • White rump with a black line through it
  • Forked tail


A winter breeder on islets off Guadalupe I. (western Mexico); nonbreeding range poorly known, but apparently disperses south in eastern Pacific, to at least as far as the Galapagos Islands.

Outside breeding season pelagic.


This is a monotypic species.[1]

Has been considered conspecific with Leach's Storm Petrel and Townsend's Storm Petrel in the past.


Close to the sea in well concealed areas such as rock crevices, shallow burrows.

Can turn up on lakes and reservoirs, many miles inland, as a result of storms



A single white egg is laid. Visits the nest only at night


Small fish and crustaceans.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
  2. Gill, F and D Donsker (Eds). 2016. IOC World Bird Names (version 6.3). Available at http://www.worldbirdnames.org/.
  3. Kirwan, G.M. (2020). Ainley’s Storm-petrel (Hydrobates cheimomnestes). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/1538362 on 28 March 2020)

Recommended Citation

External Links

GSearch checked for 2020 platform.