Tripod Ball Heads are small, compact and versatile. Track the action (especially when photographing birds) with a ball head (or ballhead), a great addition to your travel kit, you can easily replace a pan/tilt type head. For nature or sports video shooting adjust the control knobs tension to quickly track the action. The Arca-Swiss® compatible quick release plate is perfect for macro photography. Built in notch makes going from horizontal to vertical camera positioning easy. With a quick release plate, built-in horizontal and vertical bubble levels, calibrated base with standard 3/8-16 inch threaded opening and 360 degree panning you’ve converted your tripod into a more versatile stabilizer. Ball heads and monopods are also a great combination. Here’s a birding photography tip, when using a ball head on a monopod, keep the monopod short and prop it into your waist area, (inserting into a flashlight holder attached to your belt works great) you can track the action more easily that trying to walk around a tripod.
Here’s some links to other Tripod Accessories you’ll probably like: