Pincoya Storm-Petrel vs Elliot's Storm-Petrel

In short

The Pincoya Storm-Petrel and Elliot's Storm-Petrel can be distinguished primarily by the Pincoya's bolder, whiter bar across the upper wing surface and more white on the vanes of the outer tail feathers. Both species have a white belly patch, but the Pincoya's wing markings are more pronounced.

Identification tips

• Look for the bold, white bar on the upper wing surface of the Pincoya Storm-Petrel.
• Check for more extensive white on the tail feathers of the Pincoya.
• Observe behavior: Pincoya may plunge-dive and perform a 'mouse-run' on the water.

Size

Both species are similar in size, typical of small storm-petrels.

Plumage

Pincoya Storm-Petrel has a much bolder, whiter bar across the upper surface of the wing and more white on the vanes of the outer rectrices compared to Elliot's Storm-Petrel. Both have a white belly patch.

Behaviour

Pincoya Storm-Petrel exhibits unique behaviors such as plunge-diving and a 'mouse-run' across the water with wings held close to the body. Both species forage on the water using foot-pattering.

Habitat

Both species are oceanic and are typically found at sea, but specific habitat preferences are not well-documented.