Outdoor stickup cam not recording at night

Hi. My stickup cam records all day ..picks up all movement, but at night its not recording any movement at all unless a human or our dog walks in motion detector area...even the 60 min snapshot does not record. In the day it picks up every movement and i mean every movement of Gazebo top flapping, large shrubs/flowers moving, but at night even in a heavy wind with all moving outside...NOTHING.