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Birding
Bird Identification Q&A
Hippo - North Wales
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<blockquote data-quote="Motmot" data-source="post: 1485669" data-attributes="member: 72"><p>The marks are not the beginning and end of the tertials. They show the primary projection length (from wing tip to longest tertial tip) and that same length on the tertials (from the longest tertial tip upwards). I guess that's the way to compare projection vs tertial length. I've reedited the Melodious pic.</p></blockquote><p></p>
[QUOTE="Motmot, post: 1485669, member: 72"] The marks are not the beginning and end of the tertials. They show the primary projection length (from wing tip to longest tertial tip) and that same length on the tertials (from the longest tertial tip upwards). I guess that's the way to compare projection vs tertial length. I've reedited the Melodious pic. [/QUOTE]
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Birding
Bird Identification Q&A
Hippo - North Wales
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