The Top Six Worst Birds To Start A War Against
10. Pigeons, Corvids, Song Birds, & basic small city birds
There are just so many...
9. Geese, Swans, Ducks, Penguins & Loons
Let's face it, no one wants to go up against these hyperaggressive Loonatics.
(see what I did there?

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8. Vultures
First the dead and now the living! But seriously a few species drop rocks, and even bones in an attempt to crack open the bones of their prey.
7. Hawks
Essentially your basic bird of prey build.
6. Falcons
Like hawks but instead of attacking with their claws they specialize in beak warfare. Plus they're notorious for dive-bombing their prey.
5. Emus
Australia already lost a war against these guys, plus they apparently know how to calculate the range of a gun.
4. Eagles
Basically larger hawks that traded their speed for more strength and power.
3. Owls
Kinda like nocturnal hawks that have unlocked stealth. They're essentially silent but when they do make noise it sounds like the gates to hell have opened up.
2. Ostriches
Emus on steroids really.
1. Cassowaries
So they're essentially a hybrid of emus and velociraptors, oh and they have a pretty awesome crest too.