Hand swing projection

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The hand swing projection is a term from the topography of birds. It measures the part of the wing tip that protrudes beyond the longest umbrella spring when it is put on . It is used as an auxiliary criterion when differentiating between some very similar species.

  • Hand swing projection

  • The Marsh Warbler ( Acrocephalus palustris ) has a comparatively long hand-wing projection

  • Comparison of the hand swing projection in the chiffchaff (left; short) and Fitis (right; long)

swell

Individual evidence

  1. ^ Lars Jonsson: The birds of Central Europe and the Mediterranean area. Franckh-Kosmos Verlag, Stuttgart 1992, ISBN 3-440-06357-7 , p. 11 - wing shape.

literature