We have a motion sensor camera set up in our timber during hunting season. Once the camera senses motion, it will take a picture. We bought this in hopes of catching some great shots of deer.
While the camera has taken some shots of deer, most of them are of smaller animals that we aren't interested in getting pictures of. It will take a picture of anything such as a squirrel or rabbit than runs in front of it.
In the fall when the leaves are falling from the trees, sometimes this will even activate the sensor in the camera. The concept behind these cameras is great, but I wish there was a better way to control what it actually takes pictures of.