Here’s an interesting kit for a PIR sensor controlled camera. Though with only a 640×480 CMOS view, you may want a higher resolution to identify stealthy intruders -

When the sensor detects movement in a room it will take a burst of 10 photos with the digital camera. Each photo is taken at 0.5sec interval. After the 10 photos, the camera waits 3 seconds for further movement and if it is detected, the process is repeated until 80 photos are taken.
The photos can then be downloaded to your PC (via the USB connection on the board) for viewing.

Could be fun to keep in the fridge! – [via] Link

Related:

HOW TO – Make a “Witness camera” – Link

In the Maker store:

High-Speed Photography kit – Link