This is usually caused by one of the following:
Settings - sometimes, whether intentional or accidental, customers might update a camera setting that triggers this. Try resetting camera settings to factory defaults from the Yellowstone.ai app. This should take effect overnight and you should start getting fewer pictures. The specific settings that are most likely to trigger pictures of nothing are: Time Lapse turned ON, Web Control set to Instant, and PIR Sensitivity set to High.
Slow-moving or fast-moving subjects – The camera will detect motion and take a picture 0.4 seconds later. If your subjects are close to the camera and moving quickly, they might be out of the camera’s view before the camera has time to take a picture. If you believe this is happening, try to move the camera back, so that subjects spend more time in front of the camera before exiting the field of view. Conversely, slow-moving subjects can occasionally trigger the motion sensor before they enter the field of view, especially in colder weather. If you believe this is happening, try setting a 3-, 4-, or 5-shot multishot in the Camera Settings section of your app. Perhaps the first picture or two won’t show anything, but the subject will enter and be visible in pictures 3, 4, or 5.
Mount - Be sure that your camera is mounted to a sturdy immovable object. Avoid blowing grass/branches, warm rocks and warm driveways within 20 feet of the camera. If the above doesn't help, then try changing PIR sensor sensitivity to Medium or Low
If you have activity in front of your camera for extended periods, and you don’t want pictures constantly, try setting a PIR Delay of ten minutes, or longer. This can be done using your app, or using the camera navigation menu.