Flickr - law keven - Happy Feathery Friday

The speculum is a patch, often distinctly coloured, on the secondary wing feathers, or ''remiges'', of some birds. Examples of the colour(s) of the speculum in a number of ducks are: *

Common teal The Eurasian teal (''Anas crecca''), common teal, or Eurasian green-winged teal is a common and widespread duck that breeds in temperate Eurosiberia and migrates south in winter. The Eurasian teal is often called simply the teal due to being th ...

and

green-winged teal The green-winged teal (''Anas carolinensis'') is a common and widespread duck that breeds in the northern areas of North America except on the Aleutian Islands. It was considered conspecific with the Eurasian teal (''A. crecca'') for some time, ...

: Iridescent green edged with buff. *

Blue-winged teal The blue-winged teal (''Spatula discors'') is a species of bird in the duck, goose, and swan family Anatidae. One of the smaller members of the dabbling duck group, it occurs in North America, where it breeds from southern Alaska to Nova Scoti ...

: Iridescent green. The species' common name comes from the sky-blue wing coverts. *

Crested duck The crested duck or South American crested duck (''Lophonetta specularioides'') is a species of duck native to South America, the belonging to the monotypic genus ''Lophonetta''. It is sometimes included in ''Anas'', but it belongs to a South Am ...

and bronze-winged duck: Iridescent purple-bronze, edged white. *

Pacific black duck The Pacific black duck (''Anas superciliosa''), commonly known as the PBD, is a dabbling duck found in much of Indonesia, New Guinea, Australia, New Zealand, and many islands in the southwestern Pacific, reaching to the Caroline Islands in the no ...

: Iridescent green, edged light buff. * Mallard: Iridescent purple-blue with white edges. *

American black duck The American black duck (''Anas rubripes'') is a large dabbling duck in the family Anatidae. It was described by William Brewster in 1902. It is the heaviest species in the genus ''Anas'', weighing on average and measuring in length with an ...

: Iridescent violet bordered in black and may have a thin white trailing edge. *

Northern pintail The pintail or northern pintail (''Anas acuta'') is a duck species with wide geographic distribution that breeds in the northern areas of Europe and across the Palearctic and North America. It is migratory and winters south of its breeding ...

: Iridescent green in male and brown in female, both are white on trailing edge. * Gadwall: Both sexes have white inner secondaries. *

Yellow-billed duck The yellow-billed duck (''Anas undulata'') is a 51–58 cm long dabbling duck which is an abundant resident breeder in southern and eastern Africa. This duck is not migratory, but wanders in the dry season to find suitable waters. It is h ...

: Iridescent green or blue, bordered white. Bright wing speculums are also known from a number of other birds; among them are several

parrots Parrots, also known as psittacines (), are birds of the roughly 398 species in 92 genera comprising the order Psittaciformes (), found mostly in tropical and subtropical regions. The order is subdivided into three superfamilies: the Psittacoide ...

from the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

Amazona Amazon parrots are parrots in the genus ''Amazona''. They are medium-sized, short-tailed parrots native to the Americas, with their range extending from South America to Mexico and the Caribbean. ''Amazona'' is one of the 92 genera of parrots t ...

'' with red or orange speculums, though in this case the colors are pigmentary and non-iridescent.

References

{{DEFAULTSORT:Speculum Feathers Feathers Ducks