National Geographic Society

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The earth's oceans are dotted with islands from tiny sand covered atolls to the vast continent of Australia. Being surrounded by water means that sometimes the animals that live on them evolve in strange ways or develop unique hunting methods. See amazing animal behaviour from the Galapagos Finches who've earned the nickname "vampire finches" from their habit of drinking the blood of other birds, to the Santa Catalina Rattlesnake which has developed into a successful hunter by losing the rattle that's given it its name.