Can anyone tell me how to kill the flying crows...

in the last hatchery??? I can't seem to affect them at all. All I can do is hope the bombs miss my machine and critters!

Never mind...figured it out! I had to spend a huge wad of money on the top weapon and zap the bombs with it while they're in midair.

you don't actually have to buy the lighting rod. You can click on the bombs and destroy them without it. The lighting rod simply helps destory monsters faster.