Portland Bird Observatory
and Field Centre
Subalpine Warbler Sylvia cantillans
Portland Bill, June 15th 2003
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photos © Martin Cade
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Portland Bird Observatory
and Field Centre
Subalpine Warbler Sylvia cantillans
Portland Bill, June 15th 2003
Biometry (measurements in mm; primaries numbered ascendently) Bill length (to feathering) 10 Bill width (at proximal end of nostrils) 3.6 Bill depth (at proximal end of nostrils) 2.7 Wing length (maximum chord) 60 Tail length 47 Tail/wing ratio (x100) 78.3 Wing-point P3/P4 Emarginations P3, P4, P5 (+ P6 faintly) 1st primary > primary coverts 7 1st primary < 2nd primary 21 2nd primary < wing-tip 5 6th primary < wing-tip 1 10th primary < wing-tip 12 1st secondary < wing-tip 15 Tarsus length 20.6 Weight 10.7 gms
photos © Martin Cade