Grey-backed Storm-Petrel vs Streaked Shearwater

In short

The Grey-backed Storm-Petrel and the Streaked Shearwater are distinct in size and plumage. The Storm-Petrel is much smaller and has a distinctive grey back, while the Shearwater is larger with streaked upperparts. Observing their flight patterns and habitats can also aid in identification.

Identification tips

1. Size: Note the significant size difference; the Storm-Petrel is much smaller. 2. Plumage: Look for the grey back of the Storm-Petrel versus the streaked upperparts of the Shearwater. 3. Flight Pattern: Observe the fluttering flight of the Storm-Petrel compared to the gliding of the Shearwater. 4. Habitat: Consider the location; Storm-Petrels are more oceanic, while Shearwaters are often near coasts.

Size

The Grey-backed Storm-Petrel is significantly smaller than the Streaked Shearwater, which is a medium-sized seabird.

Plumage

The Grey-backed Storm-Petrel has a grey back with a white rump and underparts, while the Streaked Shearwater features streaked brown and white upperparts and a paler belly.

Behaviour

Grey-backed Storm-Petrels often flutter low over the water, while Streaked Shearwaters glide with stiff wings and are more likely to be seen in larger flocks.

Habitat

Grey-backed Storm-Petrels are typically found in open ocean waters, whereas Streaked Shearwaters are often seen closer to coastal areas and islands.