Tell me: what do you see?

[venta]

Can any ornithologically-inclined person tell me what I saw yesterday?

This was in Kew gardens. They have parakeets (which roam around freely in the wild in West London) and peacocks (which do not), as well as the usual array of ducks, geese and swans. They don't really specialise in fancy birds, but I concede it might be a specimen they've brought in rather than something that just hopped over the fence. I didn't see it fly, or even attempt it, but it ran pretty quickly.

Our best answers thus far are "graffiti-art peacock" and "souped-up pheasant".