Cory's Shearwater vs Balearic Shearwater

In short

Cory's Shearwater and Balearic Shearwater can be distinguished by their size and plumage. Cory's is larger with a pale head and underparts, while Balearic is smaller and darker overall. Both species have similar flight patterns, but their vocalizations differ when heard.

Identification tips

1. Size and Structure: Look for the larger size and bulkier build of Cory's Shearwater. 2. Plumage: Note the pale head and underparts of Cory's compared to the darker, more uniform plumage of Balearic. 3. Habitat: Consider the location; Balearic is more coastal, especially in the Mediterranean. 4. Vocalization: Listen for the deeper calls of Cory's, though this is less reliable at sea.

Size

Cory's Shearwater is noticeably larger and bulkier compared to the smaller, more slender Balearic Shearwater.

Plumage

Cory's Shearwater has a pale head and underparts with a contrasting dark upperwing, while Balearic Shearwater is generally darker with a more uniform brownish tone, especially on the underparts.

Behaviour

Both species exhibit similar flight behavior, characterized by long glides and few wingbeats, typical of shearwaters.

Habitat

Cory's Shearwater is often found in more open oceanic waters, while Balearic Shearwater tends to stay closer to coastal areas, particularly in the Mediterranean.

Voice

Cory's Shearwater has a deeper, more guttural call, whereas Balearic Shearwater's call is higher-pitched and more rapid, though vocalizations are rarely heard at sea.