rectrix

(redirected from rectrices)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to rectrices: Remige, Retrice

rec·trix

 (rĕk′trĭks)
n. pl. rec·tri·ces (rĕk′trĭ-sēz′, rĕk-trī′sēz)
One of the stiff main feathers of a bird's tail, used to stabilize the bird while in flight and to control its direction.

[Latin rēctrīx, feminine of rēctor, director; see rector.]

rectrix

(ˈrɛktrɪks)
n, pl rectrices (ˈrɛktrɪˌsiːz; rɛkˈtraɪsiːz)
(Zoology) any of the large stiff feathers of a bird's tail, used in controlling the direction of flight
[C17: from Late Latin, feminine of rector governor, rector]
rectricial adj

rec•trix

(ˈrɛk trɪks)

n., pl. rec•tri•ces (rɛkˈtraɪ siz, ˈrɛk trəˌsiz)
one of the tail feathers of a bird controlling direction during flight.
[1760–70; < Latin rēctrīx, feminine of rēctor rector; see -trix]
Mentioned in ?
References in periodicals archive ?
Median and greater wing coverts, rectrices, and uppertail coverts were growing and all were dark gray with white tips.
2009) found that tail length and the extent of black on the outermost rectrices were the best predictors of sex in northern shrikes (Lanius excubitor) on the basis of their discriminant function analysis (DFA).
Adults of both sexes are mostly black with green-tinged back and wing-coverts, and white lower flanks and outer rectrices.
Maria Giosafat in Catania, on the contrary, two women, Margarita de Romano and Agata de Josafat, who had an assembl y room built, were called magistrae et rectrices (teachers and rectors) in a episcopal document.
There are long feathered leggings and the tail has extraordinarily long rectrices, arranged in a fanned diamond-shape.
Meadow green; the smallest lower wing coverts scarlet red, the larger ones and the undersides of the remiges and rectrices olive green, beak white; total length 34 cm, wing 17 cm.
We aged yellow rails according to four criteria: 1) shape of the secondaries and the extent of the white patch on these feathers; 2) presence-absence of white spots on primary coverts; 3) shape of the rectrices and the extent of the white on these feathers; and 4) molt limits on the scapulars, humerals, and proximal secondary coverts (Pyle, 2008).
Theycanbe spottedbytheircolouring o fblack withgreen-tingedbackand wing-covertsandwhitelowerflanks andouter rectrices.
The birds were initially suspected to be crosses between a Setophaga warbler and a Nashville Warbler (Oreothlypis ruficapilla) because of the presence of wing bars, but not "windows" in the rectrices, although such wing bars were subsequently observed in juvenile Oreothlypis museum specimens (see Results for detailed plumage description).
Ontario, Canada) sutured between the central rectrices (see Halterman, 2009); weight of a transmitter was ca.