Cory's Shearwater vs Manx Shearwater

In short

Cory's Shearwater and Manx Shearwater differ notably in size and plumage. Cory's is larger with a bulkier build and paler underparts, while Manx is smaller with a more contrasting black-and-white appearance. These differences are most apparent in flight.

Identification tips

1. Size and Structure: Look for the larger, bulkier Cory's Shearwater compared to the smaller Manx. 2. Plumage: Note the paler underparts of Cory's versus the stark black-and-white contrast of Manx. 3. Vocalization: Listen for Cory's deep moans versus Manx's higher-pitched calls. 4. Flight Style: Cory's may appear more languid due to size, while Manx is more agile.

Size

Cory's Shearwater is significantly larger and bulkier than the Manx Shearwater.

Plumage

Cory's Shearwater has a pale gray-brown upper side and a whitish underside, while the Manx Shearwater is more contrasting with black upperparts and white underparts.

Behaviour

Both species exhibit similar flight patterns typical of shearwaters, with gliding and flapping, but Cory's may appear more languid due to its larger size.

Habitat

Both species are pelagic, often seen far from land, but Manx Shearwaters are more likely to be seen closer to shore during breeding season.

Voice

Cory's Shearwater has a distinctive, deep, moaning call, while the Manx Shearwater's call is higher-pitched and more rapid.