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Keywords: feather
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Journal Articles
J Exp Biol (2019) 222 (5): jeb194431.
Published: 8 March 2019
... transcripts in revealing the molecular basis of divergence in feather pigment synthesis during early-stage speciation in crows. Using a padlock probe assay combined with rolling circle amplification, we quantified cell-type-specific gene expression in the histological context of growing feather follicles...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (14): 2173–2181.
Published: 15 July 2016
... feathers of almost all birds. Using mechanistic criteria emerging from recent work on sonations, we sought to: (1) identify characteristics of rock pigeon flight feathers that might be adapted for sound production rather than flight, and (2) provide evidence that this morphology is necessary for in vivo...
Journal Articles
J Exp Biol (2012) 215 (3): 405–415.
Published: 1 February 2012
...Thomas Bachmann; Jens Emmerlich; Werner Baumgartner; Jochen M. Schneider; Hermann Wagner SUMMARY Flight feathers of birds interact with the flow field during flight. They bend and twist under aerodynamic loads. Two parameters are mainly responsible for flexibility in feathers: the elastic modulus...
Journal Articles
J Exp Biol (2011) 214 (5): 717–725.
Published: 1 March 2011
... understanding of flight ontogeny, we used a propeller (revolving wing) model to test how wing shape and feather structure influence aerodynamic performance during development in the precocial chukar partridge ( Alectoris chukar , 4 to >100 days post hatching). We spun wings in mid-downstroke posture...
Includes: Supplementary data
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J Exp Biol (2004) 207 (26): 4551–4557.
Published: 15 December 2004
... 2004 thermoregulation swimming mallard Anas platyrhynchos down waterfowl metabolism feather Ducklings go to the water and swim while downy. This behavior is interesting because the available data indicate that down is much less resistant to wetting than contour feathers( Nye, 1964...
Journal Articles
J Exp Biol (2004) 207 (2): 285–293.
Published: 15 January 2004
...Michael Butler; Amy S. Johnson SUMMARY Melanin has been associated with increased resistance to abrasion,decreased wear and lowered barb breakage in feathers. But, this association was inferred without considering barb position along the rachis as a potentially confounding variable. We examined...
Journal Articles
J Exp Biol (2002) 205 (14): 2017–2027.
Published: 15 July 2002
...D. Osorio; A. D. Ham SUMMARY Bird plumage is coloured both by pigments and by spectrally selective interference in the light reflected from feather barbs. These barbs are composites of high- and low-refractive-index materials, and light is reflected at refractive index boundaries. The spatial...
Journal Articles
Journal Articles
J Exp Biol (1998) 201 (22): 3057–3065.
Published: 1 November 1998
...William R. Corning; Andrew A. Biewener ABSTRACT To evaluate the safety factor for flight feather shafts, in vivo strains were recorded during free flight from the dorsal surface of a variety of flight feathers of captive pigeons ( Columba livia ) using metal foil strain gauges. Strains recorded...
Journal Articles
J Exp Biol (1998) 201 (18): 2591–2599.
Published: 15 September 1998
...Werner Müller; Giannino Patone ABSTRACT The flight feathers and their coverts of a European kestrel Falco tinnunculus have been tested for their air transmissivity. The transmissivity was measured in both directions, i.e. from ventral to dorsal and vice versa ; the mean difference between the two...
Journal Articles
J Exp Biol (1995) 198 (5): 1219–1228.
Published: 1 May 1995
...A. Roland Ennos; John R. E. Hickson; Anna Roberts ABSTRACT The functional morphology of feather vanes was examined by combining morphological examination with mechanical tests. A geometrical model was derived which related the in-plane behaviour of the vane to the orientation of the barbs...