I love the giant rat. So cute.
The snake that can change its color is remarkable. I have never heard of a snake species that can do this, although some have shiny colors that appear to change under different lighting conditions.
There are many types of lizards in which this is a common trait (no, not just chameleons, but also anoles, some geckos, etc.). Snakes and lizards are both classified as squamates, along with amphisbaens. And snakes are thought to have evolved from lizards in the monitor family (not sure if any of these species can change color).
I wonder if the snake species evolved the trait independently or if it points to a closer link between snakes and lizards, perhaps genetically or in terms of the evolutionary time-line.
Just brain-storming here.