Grasmus (Curruca communis)

landenfilter

United Arab Emirates

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#2216
Feldbach Steiermark, Austria
15.04.2012

2de kj mannelijk

#10686
Bącz Województwo pomorskie, Poland

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#2730
Seengebiet Mansfelder Land
05.06.2017

	aantal	langste	kleinste individu	grootste individu
handpen	10 per vleugel	59.0 - 66.0mm n=47 P₆ (32%) P₇ (28%) P₇=P₆ (21%) P₈=P₇ (11%) P₈=P₇=P₆ (4%) P₆=P₇=P₈ (2%) P₈ (2%)	3538	12055
armpen	9 per vleugel	49.0 - 55.0mm n=45 S₁ (98%) S₁=S₂ (2%)	12061	12065
staartpen	12	62.0 - 74.0mm n=38 R₃ (42%) R₂=R₃ (29%) R₂ (5%) R₃=R₄=R₅ (5%) R₂=R₃=R₄ (5%) R₃=R₄ (5%) R₁=R₂ (3%) R₁ (3%) R₁=R₃=R₄ (3%)	353	12055

wing length¹

hand-wing-index^1,2 (HWI)

primaries-index

wing length/longest primary ratio

hand-wing-index/primaries-index ratio

geen gegevens beschikbaar

14 - 23% n=37

geen gegevens beschikbaar

detailed information

The wing length is measured on the flattened and straightened wing ("maximum chord") from the carpal joint to the tip of the longest primary feather, the so-called "Kleinschmidt-method".

combined data from:

The hand-wing-index, introduced by Kipp 1959, is calculated as the ratio of the hand length (difference between the length of the longest primary and the first secondary) to the wing length.

combined data from:

The primaries-index is calculated as the ratio of the longest primary feather length to the first (outermost) secondary. It is the equivalent of the hand-wing index for feather measurements.

The wing length/longest primary ratio is calculated as the ratio of the wing length to the length of the longest primary feather.

The hand-wing-index/primaries-index ratio is calculated as the ratio of the hand-wing index to the primaries-index.

¹ Tobias, J. A., et al. (2022). AVONET: morphological, ecological and geographical data for all birds.
² Kipp, Friedrich A.: "Der Handflügel-Index als flugbiologisches Maß", erschienen in "Vogelwarte - Zeitschrift für Vogelkunde", 1959, Band 20, Heft 1