Ring says: "Yellow dots in Bird's Eye View monitor the current path of your visitor. As each dot gets older, it will gradually grow redder and more transparent before disappearing fully after a few seconds. Yellow dots appear in both live streams as well as in motion recordings on the Event Timeline. It adds: "Gray dots only appear in live steams, and show where activity was detected before you answered the alert on your phone or tablet. The most recent dot is white, and the entire trail quickly fades away after you’ve entered the Live Stream. For instance, if you open a motion alert after 10 seconds, these gray dots will show where activity was detected for that time before you began live streaming."