In photography a pretty common term is “rule of thirds”. But another compositional photography term is “rule of odds: Here is the definition of the “rule of odds”. I try to use it as much as possible but it is hard with moving birds. It takes time, patience and luck. Also important is the “rule of odds” also can be applied to groups of odd numbers as in a 3 different groups of birds or whatever. Be careful with the odds, I find 3 objects works well, anything else gets lost.