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with red or orange speculums, though in this case the colors are pigmentary and non-iridescent.
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116:: Iridescent green in male and brown in female, both are white on trailing edge.
321:
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Waterfowl: an
Identification Guide to the Ducks, Geese, and Swans of the World
231:
110:: Iridescent violet bordered in black and may have a thin white trailing edge.
310:
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This article is about the patch found on some birds. For other uses, see
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Zimmerman, Dale A.; Turner, Donald A.; Pearson, David J. (1999).
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Bright wing speculums are also known from a number of other
78:: Iridescent green. The species' common name comes from the
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Examples of the colour(s) of the speculum in a number of
286:
Birds of Panama with Costa Rica, Nicaragua, and
Honduras
34:. The speculum feathers are bright blue with white edges
175:
National
Geographic Guide to the Birds of North America
257:
201:
Bellrose, Frank C. & The
Audubon Society (1983).
283:
Robert S. Ridgely & John A. Gwynne, Jr. (1989).
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308:
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173:Dunn, Jon L. & Alderfer, Jonathan (2006).
42:is a patch, often distinctly coloured, on the
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203:The Audubon Society Master Guide to Birding
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128:: Iridescent green or blue, bordered white.
104:: Iridescent purple-blue with white edges.
122:: Both sexes have white inner secondaries.
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92:: Iridescent purple-bronze, edged white.
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98:: Iridescent green, edged light buff.
260:Birds of Kenya and Northern Tanzania
251:
229:Madge, Steve; Burn, Hilary (1988).
72:: Iridescent green edged with buff.
13:
14:
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205:. National Geographic Society.
177:. National Geographic Society.
289:. Princeton University Press.
262:. Princeton University Press.
1:
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237:. Boston: Houghton Mifflin.
7:
10:
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15:
136:; among them are several
23:Patch on inner bird wings
44:secondary wing feathers
35:
29:
108:American black duck
126:Yellow-billed duck
96:Pacific black duck
90:bronze-winged duck
36:
70:green-winged teal
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114:Northern pintail
76:Blue-winged teal
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82:wing coverts.
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86:Crested duck
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66:Common teal
311:Categories
153:References
50:, of some
140:from the
317:Feathers
80:sky-blue
40:speculum
18:Speculum
146:Amazona
138:parrots
120:Gadwall
102:Mallard
48:remiges
32:mallard
30:A male
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266:
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181:
322:Ducks
142:genus
134:birds
61:are:
59:ducks
52:birds
46:, or
291:ISBN
264:ISBN
239:ISBN
207:ISBN
179:ISBN
88:and
68:and
38:The
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193:^
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