Split from Leach's Storm Petrel. Breeds on islands off west Mexico at a different time than Townsend's Storm Petrel (also split). Does not have white rump, but some Leach's also do not. |
Note forked tail, medium size, and ashy body color. |
May or may not have a V-shaped white band across rump that does not reach the tail. Note forked tail. |
Northern migrant to tropical waters (Sept. to April), and a bit larger than other storm petrels at 22 cm.. |
Smallest storm petrel at around 16 cm.. Dark brown with no white rump, similar in coloration to larger Black Storm Petrel, or Markham's Storm Petrel. |
Split from Leach's Storm Petrel. Breeds on islands off west Mexico. Very similar to Leach's Storm Petrel. |
Note white rump extends almost to the edge of the tail, and short legs that do not extend past the tail in flight. |