单词	keelback
释义	keelback /ˈkiːlbak / noun A harmless Australian snake which lives close to water, where it feeds exclusively on frogs and the cane toad, whose venom it is immune to. Amphiesma mairii, family Colubridae. The narrow bands of speckled scales which adorn the body and tail are also a typical keelback pattern.... The keelbacks living in fields are gentle little snakes. We recommend that the red-necked keelback be considered a dangerous animal and the public be discouraged from keeping it as a pet. Origin So named because each scale on the back has a keel.
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