Wildlife doesn’t pose, and it doesn’t wait for you. To become a successful wildlife photographer, you need to be prepared, have some knowledge of animal behavior, be prepared and anticipate what may happen next. (These rules also apply to candid photography of people too!)
The other axiom I say to myself often is: the more often you go out, the luckier you get. Put another way, if you stay home, you won’t get the shot, for sure!