I'm looking for a modern high definition (or close) video recording system to monitor open-cup bird nests in the field. I'm interested in a set up that will allow me to record for several hours, preferably up to 24 hrs. This will presumably require a mobile external power source. Most published examples I've found only record for a few hours at a time (until the camera battery dies) or are out-dated (poor image quality). I'd like a rain resistant set up if possible (i.e., innovative field-tested methods to keep equip dry). If anyone has experience or ideas I'd appreciate information.