primary feather


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Related to primary feather: wing feathers, Retrice

primary feather

the quill feathers on the hand of the bird's wing - the outermost flight feathers.
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Aging immature mourning doves by primary feather molt.
Vincent, "Mechanical properties of primary feathers from the pigeon," The Journal of Experimental Biology, vol.
The timing of primary feather molt was very similar from year to year (Figure 6).
Measurements of mass and primary feather length were taken on the 12th day after hatching (Table 1).
The following measurements were calculated for each cross section from each embryo at each age: (a) density of primary feather follicles as folls/[cm.sup.2] (Pf); and (b) density of secondary feather follicles as folls/[cm.sup.2] (Sf).
The birds were placed under general anesthesia, and a diode laser was used to ablate the primary feather follicles of the previously pinioned wing.
Extensive primary feather damage interferes with lift and thrust production, especially at the wingtip (Table 1).
In this study, we evaluated the use of diode laser and cryosurgery as methods of ablating primary feather follicles in domestic pigeons (Columba livia).
The bird rose and banked, undersides glittering white in the sunlight - and it might be that you have been so distracted by the exquisite fluidity of the blue-greywhite upper feathers that you missed the ink black primary feathers, that sublime final flourish to the extraordinary finery that is the male hen harrier's plumage.
The feather quality was poor with broken primary feathers on both wings and tattered feathers over the remainder of the body.