Leach's Storm-Petrel vs Wedge-rumped Storm-Petrel

Leach's Storm-Petrel and Wedge-rumped Storm-Petrel can be distinguished by their tail shape and rump coloration. Leach's has a forked tail and a white rump patch, while Wedge-rumped has a square tail and a more extensive white rump that wraps around the sides.

Look for the tail shape first: forked in Leach's, square in Wedge-rumped. Check the rump: Leach's has a smaller white patch, while Wedge-rumped's white extends around the sides. Consider the location: Wedge-rumped is more tropical.

Both species are similar in size, but Leach's Storm-Petrel is slightly larger overall.

Leach's Storm-Petrel has a distinct forked tail and a white rump patch, whereas Wedge-rumped Storm-Petrel has a square tail and a more extensive white rump that wraps around the sides of the body.

Both species exhibit similar flight patterns, characterized by fluttering and gliding over the ocean surface. However, Leach's Storm-Petrel may appear more erratic in flight.

Both species are pelagic, often found far from land, but Wedge-rumped Storm-Petrel is more commonly associated with tropical waters.

Vocalizations are not typically used for field identification as both species are generally silent at sea.