They get their name not from their skin color, which tends to be olive to gray, but rather from the blue-black color of the inside of their mouth, which they display when threatened.
它们并不是因为皮色而得名，它们的皮色有点橄榄色到灰色之间，而是由于当它们受到威胁时，张开嘴巴，嘴巴里面颜色是蓝黑色而得名的。
A yellow and olive warbler (Oporornis philadelphia) of eastern North America, having a bluish gray hood set off by a black band on its breast.
一种分布于北美东部地区的黄色和橄榄色的林莺（哀林莺） ，长有淡蓝灰色的羽冠，胸口衬有黑条纹。
Colour resembling unripe olives, olive is a modified spectral colour that is produced through a mixture of green and yellow with either gray or brown pigments of varying proportions.
颜色似不成熟橄榄，橄榄油，是一种改良的光谱色就是通过制作混合绿色与黄色或灰色或褐色色素的比例不同。
He was an Air Force captain, and his blue uniform stood out amid our Army olive drab and cadet gray.
他是一名空军上尉，他那蓝色的制服在我们陆军的草绿色制服和暗灰色制服中间格外显眼。
The species has olive - gray body plumage, a black cap, orange - yellow eye markings, and yellow, red, and white patches on its wings.
这个种类有著橄榄灰的体羽毛，黑色的冠，橙黄色的眼影。翅膀上有黄，红，白色的点缀。
The species has olive - gray body plumage, a black cap, orange - yellow eye markings, and yellow, red, and white patches on its wings.
这个种类有著橄榄灰的体羽毛，黑色的冠，橙黄色的眼影。翅膀上有黄，红，白色的点缀。
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