The Green Green-blooded Tree Skink (Prasinohaema virens), from New Guinea, has green blood!!! The substance that causes this, and also makes some of the tissues and organs turn green, is called biliverdin. This substance is also highly toxic, and those who devour this little fellow.
Find out more about these pretty little lizards in an article from io9 that I posted last year… here.
(via typhlonectes)