yeah try shutter priority. most bird action shots need to be at least 1/1000 and even higher if possible. i like the colors and lighting in #9 the swan picture. a little tip for composition try to keep out of focus stuff behind the main subject of focus, its more visually appealing.
also with wildlife most people like to see a nice sharp head. sometimes focusing on the head is hard. you may need to up you aperature a little to gain DOF is you have good lighting. and you can focus on the body but still have head in focus, for action photos.
also try to shoot raw. gives you more leverage with post processing and sharpening. if you are resizing for web like most everyone does. resize then sharpen will give a sharp looking image.
just a few tips, good luck, wildlife photography is fun, and addicting