Scopoli's Shearwater look-alikes
Calonectris diomedea
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Open the appSeveral birds can be mistaken for the Scopoli's Shearwater. Compare the key differences below to confirm your sighting.
Birds to compare
Cory's Shearwater
Calonectris borealis
Key differences
Until recently, Cory's Shearwater was considered a subspecies of Scopoli's. The main distinction is genetic and subtle morphological differences. Cory's (Atlantic) typically has a slightly larger bill and a more extensive dark patch on the underwing primaries, extending further towards the wingtip. Scopoli's (Mediterranean) generally has a cleaner white underwing with a more restricted dark primary patch. Vocalizations also differ, with Cory's having a more nasal call.
Great Shearwater
Ardenna gravis
Key differences
Great Shearwater is similar in size but has a distinct dark cap, a white collar, and a dark belly patch, which Scopoli's lacks. Its bill is also darker and more slender. The flight pattern is also slightly different, with more frequent wing beats.
Streaked Shearwater
Calonectris leucomelas
Key differences
Streaked Shearwater is an Indo-Pacific species, unlikely to overlap in range. It has a distinctive streaked appearance on the head and neck, which Scopoli's lacks. Its bill is also paler yellow.
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