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
Selected Biometry (measurements in mm; primaries numbered ascendently) Bill length (to feathering) 8 Wing length (maximum chord) 57 Tail length 53 Tail/wing ratio (x100) 92.9 Wing-point P3/P4 1st primary < 2nd primary 31 2nd primary < wing-tip 2.5 5th primary < wing-tip 1 6th primary < wing-tip 2.5 1st secondary < wing-tip 12 Tarsus length 17.6
photos © Martin Cade