Minnesota Birdsong: An interactive poster Cute interface with birdsong content provided by the always amazing Cornell Lab of Ornithology.
Time to listen to Bird Song Radio - A 'filler' radio station that played on DAB radio in the UK until this week has been pulled from the air, much to the chagrin of thousands of listeners. Reportedly, Terry Pratchett is a fan, saying "There's something about the sound of the outdoors that adds texture to a room. It cools the room down, makes you feel relaxed." [more inside]
The universal grammar of birdsong is genetically encoded. "A new study, published online in the journal Nature, shows that the songs of isolated zebra finches evolve over multiple generations to resemble those of birds in natural colonies. These findings show that song learning in birds is not purely the product of nurture, but has a strong genetic basis, and suggest that bird song has a universal grammar, or an intrinsic structure which is present at birth."
RavenViewer. The Cornell Lab of Ornithology offers free sound analysis software that allows you to simultaneously listen to and watch spectograms of animal communication, such as the uncanny mimicry of a lovesick Satin Bowerbird or the chilling call of the Common Loon. If birds aren't your bag, there's lots of other animal sounds (and stunning video) to explore.
Songs of Brazilian Birds A fantastically diverse collection of .au files, including the beautifully evocative Organ Wren or Uirapuru, the mooing of the Capuchinbird, the sci-fi minimalism of the Short-tailed Antthrush and a duet of Laughing Falcons (they'll make you laugh at the end).