From Wildlife Extra:
Bright blue lizard discovered in the rainforests of Vietnam
Lizard can be seen in Ho Chi Minh [City]
January 2013. Reptile specialists from the Alexander Koenig Museum in Bonn, together with colleagues from the Lomonosov Moscow State University discovered a magnificent new lizard in the south of Vietnam which has been named Calotes bachae.
Unusually, like a Chameleon, they can also change their colours. For example, at night they are rather dark and brownish, almost inconspicuous. When courting they are bright blue, but after a turf war inferior males lose their colours, paling in just a few minutes.
The animals have been known to the Vietnamese and to scientists for a long time. However, they assumed that this lizard was the same species of blue lizard known from Myanmar and Thailand. However, the German-Russian research team determined, by using a genetic test, that this lizard belongs to a different species.
It is relatively easy to spot the new species as it seems quite happy to live in urban areas, and even in a metropolis like Ho Chi Minh City, where you can find the beautiful animals in parks and flower beds.
The finding was described in the scientific journal Zootaxa.
See also here.