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Birding
Bird Identification Q&A
1t summer common terns?, Suffolk
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<blockquote data-quote="CAU" data-source="post: 1538149" data-attributes="member: 55324"><p>No. Only adult summer Common Terns have orange/red legs and orange/red beaks with black tips. First summer and some second summer birds have black beaks and legs (also adults have completely black beaks in winter).</p><p></p><p></p><p></p><p>IIRC some first summer Common Terns may have already replaced all the juvenal primaries. Such birds might be impossible to separate from second summer birds. As I see at least no obvious juvenal primaries (which would be very worn and very dark) on the Common Tern (the second bird), I wonder how it can be separated from a second summer bird? Although most second summer birds have more black on the forehead, not all do (IIRC there's an article in some old issue of BB highlighting the difficulties of ageing subadult Common Terns).</p></blockquote><p></p>
[QUOTE="CAU, post: 1538149, member: 55324"] No. Only adult summer Common Terns have orange/red legs and orange/red beaks with black tips. First summer and some second summer birds have black beaks and legs (also adults have completely black beaks in winter). IIRC some first summer Common Terns may have already replaced all the juvenal primaries. Such birds might be impossible to separate from second summer birds. As I see at least no obvious juvenal primaries (which would be very worn and very dark) on the Common Tern (the second bird), I wonder how it can be separated from a second summer bird? Although most second summer birds have more black on the forehead, not all do (IIRC there's an article in some old issue of BB highlighting the difficulties of ageing subadult Common Terns). [/QUOTE]
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Bird Identification Q&A
1t summer common terns?, Suffolk
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