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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Algarve Shearwater (1 Viewer)

ndsutcliffe

SkyBlue136
Taken this morning off Carrapateira, Western Algarve.

I assumed this to be Cory's Shearwater but seems to have white webs on the inner primaries and also seems quite clean underwings. So might this be Scopoli's?

IMG_0512.JPGIMG_0513.JPG
 
Looks like a Cory's - whitish belly/axillaries with no dark markings, pale robust bill with dark marking near the tip, and thick dark border to the hand.
 
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One thing I tend to look for when watching Cory's/Scopoli's, from a land based seawatching perspective, is the extent of dark leading edge to the hand (not something I've seen mentioned in lit but something I do personally look for).

Scopoli's imo have a tendency to have less of a dark leading edge, on some birds seemingly absent, where as Cory's I feel has a tendency to have a broader dark leading edge.

These birds are a good example of that I reckon. Anyone else noticed this in the field?

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Owen
 
One thing I tend to look for when watching Cory's/Scopoli's, from a land based seawatching perspective, is the extent of dark leading edge to the hand (not something I've seen mentioned in lit but something I do personally look for).

Scopoli's imo have a tendency to have less of a dark leading edge, on some birds seemingly absent, where as Cory's I feel has a tendency to have a broader dark leading edge.

These birds are a good example of that I reckon. Anyone else noticed this in the field?

View attachment 1586209
Owen
Some more thoughts on this here:


Owen
 
Hello Owen,

wow what an excellent blog-post, full of your experience, interesting pictures, helpful captions and food for thought. Well worth reading in depth many times and come back to it for reference.
(might well worth extended and printed if you want this?)

Thanks for sharing your experience!
 

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