If you are a hobbyist photographer or just a wildlife enthusiast; there is more than one time that an aerial device being able to capture images and even videos may be needed.
Security, promotional, real estate, news or just amateur aerial photograph are some of the fields that can take advantage of having a hi definition camera mounted on an electric helicopter
The Draganflyer X6 by Draganfly, is a remotely operated, unmanned, miniature helicopter designed to carry wireless video and still cameras. The Draganflyer X6 helicopter uses 11 sensors and thousands of lines of code to self-stabilize during flight. This means the Draganflyer X6 is easier to fly than any other helicopter in its class. The Draganflyer X6 helicopter accepts multiple interchangeable video camera and still camera modules. Check the amazing photos it can take! Price on request.
A more affordable version is the AR Drone by Parrot. For $299 you can get the iPhone/iPod Touch/iPad controlled quadricopter. It can be flown inside or outside and comes with protective "bumpers" for inside crashes. A mix of captors, wide angle camera, high speed camera and MEMS (Micro Electro Mechanical Systems), accelerometer, gyro sensors and ultrasound sensor combined with a powerful on board computer to make piloting the AR Drone easy. Simply use your iPhone or iPod Touch and just tilt and touch to control the AR Drone. The AR Drone autopilot allows easy take off and landing. After take off, autopilot stabilizes the AR Drone at a 2.5 feet altitude. When you remove your finger from the iPhone/iPod Touch the autopilot function automatically puts the AR Drone into stationary flight. Lost connection with the AR Drone? Autopilot takes over again and stabilizes the device before attempting a soft and safe landing.
If you have the knowledge, you can also built your own, like this example from Hack-A-Day: the Wyvern quadcopter.
They have great details on the built process and they came through with some thorough documentation.