If my 2 year old's table manners are any evidence, "throwing things" starts pretty early too. "like birds fly," may be a bit of a stretch, unless you're Justin Verlander, but still I appreciate the thought.
While the ability to throw as accurately as humans can and with the velocity and distance that we can is unique to us, there are some primates that give it a pretty good go. Consider Santino, a male chimp in Sweden that will hide rocks under piles of hay in a plot to later hurl them at visitors. But we definitely have the advantage in the throwing department over our ape friends, though it seems that there is a bigger disparity in accuracy between male/females in humans than in apes. I wonder why that is and what selected for that? theadvancedapes, was this a result of men being the "hunters" and therefore having to be more accurate with a spear?