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In this study, we continuously monitored Egyptian fruit bats for months, recording audio and video around-the-clock. We analyzed almost 15,000 vocalizations, which accompanied the everyday interactions of the bats, and were all directed toward specific individuals, rather than broadcast. We found that bat vocalizations carry ample information about the identity of the emitter, the context of the call, the behavioral response to the call, and even the call's addressee.

Science writer Virginia Morell, in her wonderful new book Animal Wise, describes an experiment involving horses and whinnies - whinnies being very like names. She also cites the research of ornithologist Karl Berg, who states that while most people might think, 'Well, all those [bird] calls are just noise, but I think they're having conversations." Berg has listened to so many parrots in so many nests for so long, he has been able to identify that weeks after birth, these little birds begin to use very specific peeps to identify themselves to others. Not only that, they learn the peeping "names" of their parents, brothers, sisters, and use them in conversation, as in, "Peep-duh-dee-Peep, is that you?" Apparently, dolphins also use particular clicks and whistles to designate particular individuals.

Research has shown that primates can produce unique calls for things or events in their environment, such as the arrival of a predator or discovery of high-quality food. Scientists had assumed that referential calls were innate and rigid among nonhuman primates, and not flexible and socially learned as they are among Homo sapiens. Yet, a recent study suggests that primates may, in fact, be able to engage in social learning, acquiring and using another group's sounds.

Researchers found that each dolphin has a unique sound or whistle and that dolphins mimic those that are nearby and want to see again.

Sperm whales have accents, reflecting what ocean they're from: these are socially learned. Calves go through a babbling phase, similar to humans.

We all try to talk with animals, but very few of us do so professionally. And even fewer are trying to build devices that could allow us to communicate with our pets and farm animals. Meet one person who is trying to do just that: Con Slobodchikoff, a professor emeritus at Northern Arizona University, and a modern-day Dr. Doolittle.

Primates, birds, cetaceans, dogs and other species have proven able, through extensive training, to understand human words and simple sentences. And as Ed Yong explained, in some exceptional cases, such as Kanzi and Alex, they've even been able to engage in two-way communication with humans. However, language is more than a process through which meaning is attached to words or short sentences. Language might be described as the ability to take a finite set of elements (such as words), and using a set of rules (grammar and syntax) to create infinite combinations, each of which is comprehensible. In addition, as far as we can tell, humans are the only species who can create and comprehend understandable silliness, like "Colourless green ideas sleep furiously".

Prairie dogs have different alarm calls for different predators and can also indicate the size, color, speed, etc of the predator. In fact, it was found that the animals could combine and restructure their calls to describe things they hadn't seen before. This was found by having different breeds of dog (a golden retriever, a husky, a Dalmatian, a cocker spaniel) wander through the prairie dog territory one at a time and recording the resulting alarm calls; the calls highly varied even though the 'predator' was of the same predator class. They also showed different calls when researchers wearing different colored shirts walked through the territory (the same for different heights and walking speeds).