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

In short

Leach's Storm-Petrel and Band-rumped Storm-Petrel are both small seabirds with subtle differences best observed in flight. Leach's has a more forked tail and a bounding flight pattern, while Band-rumped shows a straighter tail and steadier flight. Both species are challenging to identify at sea due to their similar size and plumage.

Identification tips

1. Look for the tail shape: Leach's has a more forked tail, while Band-rumped's is straighter. 2. Observe flight pattern: Leach's shows a bounding flight, whereas Band-rumped is steadier. 3. Consider plumage: Leach's may have a paler rump, but this can be subtle. 4. Both species are best identified in good light and with prolonged observation.

Size

Both species are similar in size, making structural differences more important for identification.

Plumage

Leach's Storm-Petrel typically has a slightly paler rump and a more forked tail compared to the Band-rumped Storm-Petrel, which has a straighter tail and can appear darker overall.

Behaviour

Leach's Storm-Petrel exhibits a distinctive bounding flight pattern, while the Band-rumped Storm-Petrel tends to have a steadier, more direct flight.

Habitat

Both species are pelagic and often found far out at sea, returning to land only to breed.