How do animals communicate?

Animals might not be able to speak or master advanced language techniques, but they certainly have other ways of communicating. Whale song, wolf howls, frog croaks, bird chips -- even the waggle dance of the honeybee or the vigorous waving of a dog's tail -- are among the panoply of ways animals transmit information to each other and to other denizens of the animal kingdom.

Communication between species can play important roles as well. One study suggested that the reason Madagascan spiny-tailed iguanas have well-developed ears -- despite the fact that they don't communicate vocally -- is so they can hear the warning calls of the Madagascan paradise flycatcher. The two species have nothing in common except for the fact that they share a general habitat and raptors like to snack on them. So when an iguana hears a bird raise the alarm among other birds, it likely knows to be on alert for incoming predators, too.

What forms of communication between animals you know?

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