Juvenile Corallus caninus (Hundskopfboa)
The later change their juvenile colours to a bright green. It is a harmless and non venomous snake though rather aggressive when disturbed. Taken through glass, too many people to ask for opening it.
It was at a snake exhibition (www.exotica.at) 2008. Low light, I had to take 6 single shots with reduced aperture and therefor small depth of field and composed it lateron to this single picture. But the colours are original!
Canon 1D III with Sigma 150/2.8 Macro