What iridescent color describes the spectacularly large gorget of the adult male Costa's Hummingbird?
Answer
Deep purple or magenta
The adult male Costa's Hummingbird is known for its remarkably showy throat patch, or gorget. This patch displays spectacular iridescence, primarily manifesting as deep purple or magenta hues. This vivid coloration, combined with the characteristic side flares that give it a fan-like appearance, makes the male readily identifiable when the light conditions allow the feathers to reflect properly. This bright, expansive coloration stands in stark contrast to the more restricted, structured color pattern seen on the male Black-chinned.

Related Questions
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