publication . Article . 2014

The Feathers ofFalco peregrinus

Anke Schmitz; Benjamin Ponitz; Christoph Brücker; Helmut Schmitz; Jan Herweg; Horst Bleckmann;
Open Access English
  • Published: 04 Aug 2014
  • Publisher: Wiley
  • Country: United Kingdom
Abstract
We investigated the mechanical properties (Young's modulus, bending stiffness, barb separation forces) of the tenth primary of the wings, of the alulae and of the middle tail feathers of Falco peregrinus. For comparison, we also investigated the corresponding feathers in pigeons (Columba livia), kestrels (Falco tinnunculus), and sparrowhawks (Accipiter nisus). In all four species, the Young's moduli of the feathers ranged from 5.9 to 8.4 GPa. The feather shafts of F. peregrinus had the largest cross-sections and the highest specific bending stiffness. When normalized with respect to body mass, the specific bending stiffness of primary number 10 was highest in F....
Subjects
free text keywords: TA, Developmental Biology, Animal Science and Zoology, Anatomy, Middle tail, Peregrinus, Feather, visual_art.visual_art_medium, visual_art, Falconiformes, biology.organism_classification, biology, Veterinary medicine, Bending stiffness, Falco tinnunculus, Alula, Accipiter

15 16 17 18 19 20 21 22 23 24 Young's -modulus E

The E-values of the cortices of the feathers of various bird species range between 1.8 - 10 GPa (Hertel, 1966; Rutschke, 1976; Purslow and Vincent, 1978; Crenshaw, 1980; Fraser and Macrae, 1980; MacLeod, 1980; Bonser and Purslow, 1995, Bonser, 2001; Cameron et al., 2003; Pannkuk et al., 2010; Bachmann et al., 2012; Vincent, 2012). The MacLeod G. 1980. Mechanical properties of contour feathers. J. Exp. Biol. 87: 65-71.

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publication . Article . 2014

The Feathers ofFalco peregrinus

Anke Schmitz; Benjamin Ponitz; Christoph Brücker; Helmut Schmitz; Jan Herweg; Horst Bleckmann;