Marked-as-favorites activities do not come along the Twitter stream? While retweets and replies appear?


I am running a Twitter streaming API to get tweets activities associated with my key words. I get the occurrence time (timestamp) of all retweets and replies over the timeline as they appear. However I could not figure out how to record marked-as-favorites activities as users hit the favorite button. I want to get all the fields for favorites activities as well like what I am getting for retweet and replies as they are coming along the stream (including userID, twitterID, timestamp, number of follower, location etc.). thanks,