Among believers, vaultgulls are said to possess golden feathers, as well as eyes of black crystal; then again, they are also said to have never before been seen, so such descriptions ought to be met with skepticism.
For these clever birds, all that is unseen is the sky; their wings slide cleanly through metal and stone as easily the wind. The only solid surface they know is the periphery of human vision, the greatest obstacle to their shimmering wings. The subtlest twitch of a single eye is enough to thrust them aside like a hurricane's gales.
