ナショナルジオグラフィックのインスタグラム(natgeo) - 10月31日 09時33分

Photo by Thomas Peschak @Thomas Peschak | When rations run short on Wolf Island, in the remote northern Galápagos, the sharp-beaked ground finches become vampires. Their sitting targets are the Nazca boobies and other large birds nesting on the plateau. Boobies thrive here, nesting among dense cactus thickets and fishing in the surrounding ocean, but the finches have a tougher time. The island has no permanent water and little rainfall. The finches–birds that inspired Darwin’s Theory of Evolution–rely on a scant diet of seeds and insects that regularly dries up. Pecking away at the base of booby flight feathers with their sharp beaks–a trait that may have evolved from feeding on the birds’ parasites–they drink blood to survive. For more photographs of vampire birds follow @Thomas Peschak.

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