You could, though depending on the measures you take to ensure someone's privacy it would probably be okay (ie, put contact details on the camera so people can

You could, though depending on the measures you take to ensure someone's privacy it would probably be okay (ie, put contact details on the camera so people can tell you they want their stuff deleted, don't record 24/7 and when picking it up again immediately delete all recordings with humans on them) I think that the intent to film animals matters more than the potential privacy violation as long as you take steps to rectify them once you pick up the camera.