Cory’s Shearwater variation

with Scopoli’s Shearwater bits

Chris Gibbins

I took pics of as many Cory’s Shearwater types as possible.  We saw one clear Scopoli’s Shearwater, and of course hundreds of Cory’s.  One (presumed) Cory’s was interesting as it matches what Steve Howell refers to  as ‘probably the maximum permissible tongues for Cory’s Shearwater– a clear but short  tongue on P10, plus others on 9 and 8.  He shows an example of such a bird off Cape Hatteras (USA- eastern Atlantic). The general impression was therefore very different to that seen on typical Cory’s. The structure to my eye is no different to Cory’s (within range showed by Cory’s), similarly so the  dark grizzled and rather brown head…  so an interesting bird. For example of Scopoli’s Shearwater in the same waters see HERE.

Normal Cory’s Shearwater:

Cory's Shearwater- showing pale 'tongues' in pattern of underside of primaries. Chris Gibbins, August 2014

Cory’s Shearwater- showing pale ‘tongues’ in pattern of underside of primaries. Chris Gibbins, August 2014

Cory's Shearwater- a typical underwing pattern. Chris Gibbins, August 2014

Cory’s Shearwater- a typical underwing pattern. Chris Gibbins, August 2014

 Cory’s with pale tongues in underwing:

Cory's Shearwater- showing pale 'tongues' in pattern of underside of primaries. Chris Gibbins, August 2014

Cory’s Shearwater- showing pale ‘tongues’ in pattern of underside of primaries. Chris Gibbins, August 2014

Cory's Shearwater- showing pale 'tongues' in pattern of underside of primaries. Chris Gibbins, August 2014

Cory’s Shearwater- showing pale ‘tongues’ in pattern of underside of primaries. Chris Gibbins, August 2014

Cory's Shearwater- showing pale 'tongues' in pattern of underside of primaries. Chris Gibbins, August 2014

Cory’s Shearwater- showing pale ‘tongues’ in pattern of underside of primaries. Chris Gibbins, August 2014

 

 

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