European Storm-Petrel vs Leach's Storm-Petrel

In short

The European Storm-Petrel and Leach's Storm-Petrel are small seabirds that can be distinguished primarily by their flight style and tail shape. European Storm-Petrels have a fluttering flight and a square tail, while Leach's Storm-Petrels exhibit a bounding flight with a forked tail.

Identification tips

• Tail Shape: Look for the square tail of the European Storm-Petrel versus the forked tail of Leach's Storm-Petrel.
• Flight Style: Note the fluttering flight of the European Storm-Petrel compared to the bounding flight of Leach's Storm-Petrel.
• Rump Patch: Check for a more pronounced white rump patch on the European Storm-Petrel.
• Vocalizations: Listen for the purring call of Leach's Storm-Petrel during the breeding season.

Size

Leach's Storm-Petrel is slightly larger than the European Storm-Petrel.

Plumage

Both species have dark plumage with white rump patches, but the European Storm-Petrel's rump patch is more pronounced and contrasts sharply with its darker body.

Behaviour

European Storm-Petrels have a fluttering flight pattern, often low over the water, while Leach's Storm-Petrels have a more erratic, bounding flight with glides.

Habitat

Both species are pelagic, but European Storm-Petrels are more commonly found in European waters, whereas Leach's Storm-Petrels have a broader range across the North Atlantic.

Voice

European Storm-Petrels are generally silent at sea, while Leach's Storm-Petrels may give a distinctive purring call during the breeding season.