One of the birds was an old friend from 2010 and I have recover him before over the years. When I ringed him he was a 2:d year bird or older and now hi is over seven year old.
The old bird from 2010.
2:nd year bird with bright tips on the unmolted feathers on alula, greater coverts and secondaries.
Same bird Close up alula and some greater coverts.
Another 2:nd year bird with brighter tips on secondaries and gc.
3 year or older bird with unmolted feathers on gc and secondaries. Note no bright tips to the older.
Another 3 year or older bird with unmolted alula, gc and secondaries without brigt tips.
Inga kommentarer:
Skicka en kommentar