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.

feather

1. skin appendages of all birds. Comprise a central shaft with a flat vane on either side. The shaft consists of the calamus, embedded in the feather follicle, and the rachis which is outside the follicle. The calamus has an opening at each end, the superior and inferior umbilicus. The inferior umbilicus contains the dermal papilla which produces the pulp which continues up the interior of the calamus to end at and pass out through the superior umbilicus. Each feather has two parts, the mainfeather and a small afterfeather which is attached at the superior umbilicus. Barbs and barbules form the bulk of the vane.
Contour feathers are large feathers that give the bird its shape. Down feathers are very small feathers. Semiplume feathers are intermediate in size between contour and down. Filoplume feathers are hairlike and remain after other feathers are plucked. They have only one small tuft of barbs. Specialized additional feathers include auricular feathers, around the ear lobes, oil gland feathers, at the oil gland on the tail, bristle feathers on the eyelids and powder feathers in aquatic birds. Remiges are the large flight feathers of the wing and rectrices the very long contour feathers coming from the side of the tail. These are the longest feathers of all in the domestic fowl.
The feather coat consists of feather tracts (see below) or pterylae that are well defined and carry contour feathers and semiplumes. They are separated by unfeathered tracts called apteria. The distribution of special feathers of particular colors in particular pterylae is what gives the breeds their distinctive appearance. The feather coat is divided up into regions that include hackle, cape, cushion, saddle, wing bars, wing fronts and wing bows.
2. long hairs on the fetlocks of draft breeds of horses and in dogs, on the ventral body, caudal aspect of the legs, and ventral tail of spaniels and setters.
3. hair-streams that produce feather-like marks, in the haircoat of an animal.

feather clipping
clipping the flight feathers with tin shears will prevent flight for several months.
feather coat
the total feather covering of a bird. Called also ptilosis.
contour feather
the externally visible feathers which determine the bird's silhouette and the contours of the wings, body and tail.
feather cushion
the plumage from the pelvic tract of the hen, forming the back cover.
feather cysts
contain unerupted feathers and keratinous debris that may form large cutaneous lumps.
feather disease
an idiopathic disease of all varieties of cockatoos, lovebirds and budgerigars as young birds and characterized by a chronic, progressive, symmetrical loss of feathers, elongation of toenails and upper beak, which later becomes necrotic and sloughs off. Called also psittacine beak and feather syndrome.
filoplume feather
hairlike feathers, commonest on neck, head.
flight feather
the strong feathers on the wings and tail of birds used in flight. Called also remiges (plural), remex (singular).
feather follicle
a small tubular invagination of the skin with a fleshy dermal papilla at the bottom from which the feather grows. The papilla is inserted in the opening at the end of the quill.
feather mites
mites that live on and in feathers, often in enormous numbers but have little pathogenicity. Include the genera of Analges and Megninia of the family Analgesidae and the genus Dermoglyphus of the family Dermoglyphidae. Other miscellaneous genera are Syringophilus, Falculifer, Freyana, Pterolichus, Pteronyssus.
feather muscles
similar to erector pili muscles of mammals; attached to the sides of the follicle; capable of elevating or lowering entire groups of feathers.
feather picking
a vice thought to be due to insecurity and manifested by the bird pecking off its own feathers. If blood is drawn cannibalism may develop.
primary feather
flight feathers on the wings of birds.
psittacine beak and feather disease
see psittacine beak and feather disease.
feather pulling
see feather picking (above).
feather pulp
remnants of vascular tissue contained in the core of each feather.
saddle feather
the plumage covering the back of male birds.
feather syndrome
see psittacine beak and feather disease.
feather tract
area of the skin of a bird in which feathers grow. They are well defined and separated by unfeathered areas called apteria.
References in periodicals archive ?
Observations on the primary feather molt of immature mourning doves in Colorado.
The bulb diameter of primary feather follicles kept increasing during embryonic stage.
The primary feather follicles on the thoracal tracts increased from 11.
In this study, we evaluated the use of the diode laser and the cryoprobe to ablate primary feather follicles and to prevent feather regrowth.
Secondaries Smaller, lighter feathers than primary feathers.
The distinctive slots between the primary feathers facilitate slower flight, which is especially useful when the raptor takes off while clutching prey in its talons.
Then there is the booming sound produced by air rushing through a male nighthawk's primary feathers as he dive-bombs a roosting female, a rival for her affections or a human intruder.
A bird's primary feathers (the long ones at its wingtips) are shaped like little wings.
The AEF staff is still waiting for four new primary feathers to grow back in on the injured wing.
Catching a bird the size of a pigeon and holding it still to snip off the primary feathers is a fairly easy job; attempting to do the same with much stronger birds which must be 12lb already and have huge, powerful wings and claws, is a bit more of a challenge, requiring as many spare pairs of gauntlet- covered hands as possible.
With increasing body size, the length of the primary feathers increases as the one-third power of mass, approximately doubling with each 10-fold increase in mass.
With the help from down the lane, the poults soon had a carpet of primary feathers to walk on, and their flying days were over - at least I hope so.