Quote Originally Posted by Tzunu un View Post
It's not a specie of fly ! It is a fruit fly strain with a particular type of mutated allele.


see this thread for info.

http://www.frogforum.net/showthread.php?t=33885


BTW: The search function (top of page on right) on Frog Forum will answer many questions and is a great source for basic information.
Thanks for that information it is always nice to learn something new.