I obtained this female amazon basin emerald tree boa from Joe Polanco's stock in 2006. 

Here she is in March 2007

Here she is in April 2007 still looking orange...

And again one month later in May 2007 with a definate change in color...the green is starting to come in nicely...

and almost completely green one month later in June 2007

Here she is on January 6, 2008.  Her white stripe has really come in nicely!