Although a number of new species of small, drab-coloured lizard are discovered and named each year, discoveries of large, conspicuously-coloured lizard species are much rarer. In 2009, however, it was announced that a new species of iguana, rose-pink (rosada) in colour and up to 1.75 m long, had been discovered living on a single volcanic mountain called Volcan Wolf on the island of Isabela in the Galapagos chain. Genetic tests confirmed that it was a very distinctive species, dating back over 5 million years, and which had already branched off from the other, yellowish-brown species of iguana here while the Galapagos archipelago had still been forming. Interestingly, the pink iguana, which has been named Conolophus rosada, had first been seen on Isabela in 1986, by park rangers, but had been dismissed as nothing more than a freak colour variety of the familiar yellow land iguana (Conolophus subcristatus).