Petrel Antillano vs Petrel de las Juan Fernández

The Black-capped Petrel and Juan Fernandez Petrel can be distinguished by their head patterns and underwing coloration. The Black-capped Petrel typically shows a distinctive black cap and contrasting white face, while the Juan Fernandez Petrel has a more uniform head pattern. Underwing patterns also differ, with the Black-capped Petrel showing more contrast.

Head pattern: Look for the black cap and white face of the Black-capped Petrel. Underwing pattern: Note the contrasting underwing of the Black-capped Petrel compared to the more uniform Juan Fernandez Petrel.

The Black-capped Petrel has a black cap with a contrasting white face, whereas the Juan Fernandez Petrel has a more uniform head pattern. Additionally, the underwing of the Black-capped Petrel is more contrasting compared to the Juan Fernandez Petrel.