Leach’s Storm-Petrel (Chapman’s)

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(Oceanodroma leucorhoa chapmani)

Chapman’s is one of two subspecies of Leach’s Storm-Petrel seen in the Pacific Ocean off southern California. Unlike the Atlantic Leach’s Storm-Petrel which has a white rump with a dark division, Chapman’s rump can vary from completely dark to almost white, with most individuals showing a “mushy” brown. The other Pacific subspecies, Townsend’s, has a white rump with additional white on the undertail coverts.

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