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"Birds learn to sing their songs and babies learn to make the sounds of their language in the same way.... Furthermore, both birds and humans go through a period [critical period] when learning is best accomplished... the brain architecture supporting babbling and birdsong is similar...the same mutated gene, FOXP2, is implicated in both [birdsong and speech]."

What a find! He talks about so many of the things we've touched on, and the fact that he titles his post "Birds R Us" is just too funny. :) I like that he provides the links to the original research, too.

This article and video explains how recent research on bird brains could give us clues as to how human language evolved.

If you're looking for the species that most closely matches our linguistic prowess, surprisingly, you won't find it in the apes, the primates, or even in the mammals. You have to travel to a far more distant relative, all the way to a family of birds known as the songbirds. The vocal life of a songbird is similar to ours in many ways. They learn songs by imitating their elders. Like human speech, these songs are passed down from one generation to the next. Songbirds are also best equipped to learn songs in their youth, and they have to practice to develop their ability. They can improvise and string together riffs into new songs, and over generations these modified songs can turn into new dialects. And like us, they come hard-wired with 'speech-centers' in their brain that are dedicated to language processing. An experiment from 2009 by Fehér and colleagues took newly hatched songbirds of the zebra finch species and raised them in sound proof chambers. They did this during their critical period of language development. Surprisingly, this culturally isolated generation of birds began to develop their own songs. These songs were less musical than your typical songbird song - they had irregular rhythms, they would stutter their notes, and the notes would sound more noisy. But the researchers were curious where this would lead. They listened to the songs of the next few generations of pupils, the offspring of these children of silence. What they found was quite amazing. In just two generations, the songs started to change in unexpected ways - they were becoming more musical. In fact, they started to converge upon the song of the wild songbirds, even though none of these birds had ever heard the wild songs. The Feher study suggests, but does not prove, that songbirds must have an innate understanding of the structures of their language. In other words, they seem to have a built-in intuition about grammar. Over time, they may be using these intuitions to develo

"Mondegreen" means a misheard word or phrase that makes sense in your head, but is, in fact, entirely incorrect. Hearing is a two-step process. First, there is the auditory perception itself: the physics of sound waves making their way through your ear and into the auditory cortex of your brain. And then there is the meaning-making: the part where your brain takes the noise and imbues it with significance. That was a car alarm. That's a bird. Mondegreens occur when, somewhere between the sound and the meaning, communication breaks down. You hear the same acoustic information as everyone else, but your brain doesn't interpret it the same way.