I'm starting to do a lot more study on the behavioural aspect of wildlife photography. Portrait-style shots bore me but I've come to realise that there are so many basic behaviours that have not been photographed/videoed in many species. There's a lot of weird bird behaviours here in Australia for example (play-fighting, courtship, etc) but I cannot find photos of them.

...that being said, I think I fundamentally don't know how to find these interesting behaviours. It really does feel like most birds do nothing but preen themselves when I'm nearby. Is there an actual technique to this kind of thing? Is it more about waiting or find the right location?