Hunting Birds (Flying)When hunting birds, it is best to hunt them from afar, as they will fly away if you get too close. I use a bow and arrows, the arrows will kill the birds in 1 shot.
You can try and approach them with a machete if you would like. I just like to hunt from afar because it seems to work better.
When hunting birds that do not fly, Ostriches and Cassowaries, I like to attack them head on with a diamond edge machete. This way, I can continue to hit them as I walk backwards, and then chase them when they run away.
Hunting Birds (Non-Flying)
It works really well for me, but you can also hunt them from afar with arrows like a flying bird. The only problem with that is that they can run away faster than you may be able to load arrows.
These tips + more here: http://survivalcraftgame.wikia.com/wiki/Tips%2C_Tricks%2C_and_Common_Mistakes