Charrán ártico (Sterna paradisaea)

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Juv.

#2396
Büsum Dithmarschen, Schleswig-Holstein, Germany
17.07.2017

Ad.

#2391
Büsum
17.07.2017

	Número	Más Larga	Individuo más pequeño	Individuo más grande
Primaria	10 Por ala	214.5 - 232.0mm n=11 Primaria₁₀ (100%)	11892	2964
Secundaria	19 Por ala	80.0 - 85.5mm n=8 Secundaria₁₃ (50%) Secundaria₁₄ (25%) Secundaria₁₁=Secundaria₁₂=Secundaria₁₃ (13%) Secundaria₁₂ (13%)	4428	2964
Rectriz	12	163.5 - 199.5mm n=10 Rectriz₆ (100%)	2397	2964

wing length¹

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

primaries-index

wing length/longest primary ratio

hand-wing-index/primaries-index ratio

250 - 271mm n=9

65 - 71% n=8

61 - 67% n=11

Datos no disponibles

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: 250 - 271mm n=9

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: 65 - 71% 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

Ad.

#4428
Walvis Bay Namibia
20.09.2018