Endemic to the Juan Fernandez Islands and superficially similar to the petrel of that name, this is a smaller species
with a different flight action, one of the "cookilaria" petrels. It tends to migrate to the north-east Pacific after breeding, thus it is less common in
the Humboldt Current. The best distinguishing feature is the dark cap. Whereas the previous species was once lumped with Cook's, this was lumped with Pycrofts. All
four present identification problems at sea due to variation, feather wear, etc.
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HOMEPAGE
