Ufo is a vector of acworks author. This vector includes UFO, Unconfirmed flying objects, Flying body, Flying saucer, Flying objects tags. To download vector (JPG, SVG, PNG, AI/EPS types) you need to register the account and log in.
As the free account, you can download for free with some limits.
As the premium account, you can download unlimited, no waiting time, etc. Enjoin premium membership at here