Drieteenmeeuw (Rissa tridactyla)

landenfilter

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Xinjiang

#11063
Norddeich Aurich, Niedersachsen, Germany
17.01.2025

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#2196
Nordstrand (Nordfriesland) Nordfriesland, Schleswig-Holstein, Germany
12.03.2012
ssp. tridactyla

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#2195
Eiderstedt Nordfriesland, Schleswig-Holstein, Germany
12.03.2012
ssp. tridactyla

	aantal	langste
handpen	10 per vleugel	227.5 - 254.0mm n=7 P₉ (100%)
armpen	21-22 per vleugel	120.0 - 144.0mm n=6 S₁₇ (67%) S₁₆ (33%)
staartpen	12	135.0 - 152.0mm n=5 R₅ (80%) R₄ (20%)

wing length¹

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

primaries-index

wing length/longest primary ratio

hand-wing-index/primaries-index ratio

286 - 317mm n=10

56 - 61% n=8

50 - 53% n=7

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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:
Avonet¹: 286 - 317mm n=10

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:
Avonet¹: 56 - 61% n=8,

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

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#2189
Kamisu (Ibaraki, Japan) Japan
26.12.2015
ssp. pollicaris