(I hope this is the right forum for asking a question about pigeon behavior...)
I notice that when Southy, my companion pigeon, takes a bath, he will sometimes slightly open his beak for a brief time (no more than a minute), then close it. He tends to do this between splashes, when he is sitting still in the water, and his eyes look very "happy" or even playful, if that makes any sense.
During today's bath, Southy opened his mouth and his tongue seemed to be sliding forward and backward a little inside his mouth, almost like a dog panting. I usually use lukewarm water, like what I would use in a bath, and because it's been warmer these days, the water was about room temperature. From what I understand, it doesn't seem that Southy can be overheated or that the water's too warm, and he seems to really enjoy his baths. He also opens his mouth wide and cocks his head back from time to time, which I've discovered is the way that pigeons yawn (very ostentatious!)
So I'm wondering if anyone else has a companion pigeon that opens his/her beak while bathing; if so, do you know why pigeons do this?