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juv.

#2169
Rottersdorf Niederösterreich, Austria
01.09.1989

Der Baumfalke besitzt in der Färbung einen weniger stark ausgeprägten Geschlechtsdimorphismus als der Wander- oder Turmfalke. Lediglich in der Größe unterscheiden sich die Geschlechter recht deutlich - Weibchen sind meist wesentlich größer.

Die Hand- und Armschwingen sind dunkelbraun gefärbt mit cremefarbenen Einkerbungen der Innenfahne, teilweise auch eingeschlosse, sodass sich cremefarbene, runde Flecken bilden. Auf den Schirmfedern verliert sich dieses Muster zu Gunsten einer relativ gleichmäßgen grau-braun Färbung und einem dunklen Kiel. Die Flügeldecken (GrHd und GrAd) zeigen kaum bis gar keine Fleckung.

Die Steuerfedern sind ebenso schwarzbraun gefärbt mit einem regelmäßigen, sauberen, cremefarbenen Querstreifenmuster. Auch der Kiel der Steuerfedern ist orangebraun aufgehellt. An der Spitze findet sich bei Jungvögeln und immaturen Vögeln eine helle Terminalbinde, bei adulten Vögeln ist diese deutlich unscheinbarer oder fehlt gänzlich.

Längste Handschwinge ist die H9 mit Maßen um die 215mm. Eine Verengung der Außenfahne zeigt sich oft unscheinbar auf der H9, eine Verengung der Innenfahne in der H9 und H10.

	number	longest
primary	10 per wing	210.5 - 222.0mm n=8 P₉ (100%)
secondary	14 per wing	99.0 - 110.0mm n=9 S₁ (100%)
retrix	12	136.0 - 153.5mm n=8 R₅ (75%) R₁ (25%)

wing length¹

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

primaries-index

wing length/longest primary ratio

hand-wing-index/primaries-index ratio

228 - 276mm n=9

54 - 60% n=8

50 - 53% n=8

no data available

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: 228 - 276mm 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: 54 - 60% 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

female

#5776