(orca brains are not only four times larger but a good deal more complex than bottlenose brains) scientists have observed an important qualitative difference between dolphin and orca communications. Orcas communicate in a socially structured way. Whereas dolphins collectively seem to chatter willy nilly with little regard to one another, orcas both captive and wild are generally more polite. They tend to wait for each other to finish calling before making their own calls. Orca call exchanges thus take on at least the surface appearance of conversations, even if only crude informational
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Orca brains 4 times larger and more complex than bottlenose
Exchanges more polite and interactive like conversation
