Speculum feathers

From Wikipedia, the free encyclopedia
Jump to: navigation, search
A male mallard. The speculum feathers comprise the patch of white-edged blue/black.

The speculum is a patch, often distinctly coloured, on the inner remiges of some birds.

Examples of the colour(s) of the speculum in a number of ducks are:

Bright wing speculums are also known from a number of other birds; among them are several parrots from the genus Amazona with red or orange speculums,[5] though in this case the colors are pigmentary and non-iridiscent.

References[edit]

  1. ^ a b c d Dunn, Jon L. and Alderfer, Jonathan (2006). National Geographic Guide to the Birds of North America. National Geographic Society. ISBN 1-4262-0072-2. 
  2. ^ a b Bellrose, Frank C. and The Audubon Society (1983). The Audubon Society Master Guide to Birding. National Geographic Society. ISBN 1-4262-0072-2. 
  3. ^ a b Madge, Steve; Burn, Hilary (1988). Waterfowl: an Identification Guide to the Ducks, Geese, and Swans of the World. Boston: Houghton Mifflin. ISBN 0-395-46727-6. 
  4. ^ Zimmerman, Dale A., Turner, Donald A., and Pearson, David J.; Illustrated by Zimmerman, Dale A., Willis, Ian and Pratt, H. Douglas (1999). Birds of Kenya and Northern Tanzania. Princeton University Press. ISBN 0-691-01022-6. 
  5. ^ Robert S. Ridgely and John A. Gwynne, Jr. (1989). Birds of Panama with Costa Rica, Nicaragua, and Honduras. Princeton University Press. ISBN 0-691-08529-3.