Everywhere—either small fry, nibblers, Hamlets on a small scale, self-absorbed, or darkness and subterranean chaos, or idle babblers and wooden sticks.
While ramblers ramble and babblers babble, the taciturn among us turn things down a notch, preferring to keep mum rather than add their voices to the verbal hubbub.
And what I noticed about this babbler genus was just that they were all, all five of the species were cooperative to varying degrees and yet lived in drastically different habitats.