For purposes of attendant confusion, I'll give you a white ibex picture -
Kidding of course. When we were riffing about Ibis and Isis, I remembered having a necklace with a rampant ibex in silver dangling from a chain. That necklace hurt (the horns), so I eventually put it in the goodwill box even though it was a beautiful thing. So, I looked up ibex, and they aren't white, just this drawing of a primitive pictograph (ancestral.com).
Back to Ibises. Or Ibi.
Or cattle egrets, or parrots.