I play very streaky as a player. I tend to go at the pin frequently and when on, the birdies come in droves. I usually can see those rounds where I get 5 or 6 birdies coming. They usually come at a time where I am hitting the 10 ft putts well and draining those putts regularly. They also tend to come when I play tougher courses with fast greens. Usually, it doesn't last very long as one stray approach can make me very conservative going forward. I tend to real it back in rather than keep going at pins when that happens. SO I would venture to say that mentality is a major factor in making birds. If you can get your mind set to be super aggressive and pull the swings off, you can go low...