no, from the back of the mountains the fly into position randomly.

my best count is 6020. but this depens a lot when you get the fire ammo. I like the game a lot, and if made right this could gate some very successful thing.
See "Jets and guns" as how this could turn out.

You might want to take a look at the old amiga game "silkworm". It made a lof ot things very right.

cheers