Rovio's North American general manager Andrew Stalbow has told listeners at the Web 2.0 conference that Angry Birds has 30 million daily average users, a number which would make it by far the most popular game on Facebook.
Currently, the most popular game on Facebook is Cityville, which is registered as having a DAU of 12.1 million with Sims Social next with 8.8 million, according to AppData.
Those numbers have dropped considerably in the last few days, following a recent redefinition of the way in which the company calculates its user numbers, removing users who navigate away from apps' landing pages without logging in.
Stalbow also revealed that the game sees an estimated 300 million minutes of play every day and has now been downloaded 400 million times. China is currently the title's second biggest market and also the fastest growing.