Patience
I have tried to get a good image of a Belted Kingfisher many times and failed. Last year a finally got a decent photo, not exactly what I wanted but pretty good. A few days ago in the Davis Bayou - a part of the Gulf Islands National Seashore, I got one just after he dove into the shallow water and emerged with breakfast. I was actually here to practice birds-in-flight and there are usually pelicans here. None that morning, So an egret or two, some osprey and this nervous, skittish, erratic bird calling and fishing. I used a long lens and a fast shutter and still nearly missed. You can see the ripples where he entered the water and the trail of dripping water that leads to him on the left edge of the frame.