<https://www.tumblr.com/kedreeva/190831750208/so-peafowl-do-this-thing-where-if-gentle-air-is>
Do you perchance have any more details on tongues? I *love* bird tongues. Why are they shaped like that? Are there variations? Are they a unique and stable like fingerprints and human tongues? Are all their tongues the same colour or does it vary based on breed/individual?
I do not have much more information on their tongues. I don't know if they're unique, as I've never looked that closely (nor will I, as it's invasive and stressful to examine the inside of their mouths usually)
The barbs on their tongue are common in fowl as far as I know, for aid in swallowing; they don't really have musculature for swallowing the way we do, gravity does the work for them, so they use their tongues in combination with throwing their heads back to hork stuff like greens and small animals down.
Tongue color can vary between pink and black/blue depending on the bird. I'm not sure if it varies specifically by mutation color, or just individuals. Andromeda's tongue was pink, Stan's tongue was pink, Artemis' tongue was pink, Mantis' tongue is black. I think Arcana's tongue was dark as well, but it's hard to say if that was normal or not since I mostly saw it while she was ill. Aurora's tongue was pink, and she's the same color as Mantis, but she was a lower % Spalding and had no European blood.