Hi Rez it was called a gamo viper express, I started a topic on here about them nearly 6 years ago - how time flys!
http://www.thehuntinglife.com/forums/topic/149272-gamo-viper-express/
they look pants tho....
as for shooting a bird in flight with an airgun I wouldent even try, If by some miracle you hit it you cant be sure where you will hit it.
Teds hold over managed tho but with a semi auto fac airgun I think.