Browning Trail Cameras are triggered by two things which are outlined below. Trail cameras are typically designed this way to keep users from getting blank scenery pictures and/or videos when leaves blow in the wind, etc.. Understanding how your trail camera operates makes reaching the desired outcome much easier.
Motion: The first thing our trail cameras look for, and most commonly known, is motion within the detection area.
Temperature: The second thing our cameras look for, and less commonly known, is a variance in temperature.
Once the trail camera sees both of these things it will then trigger and perform as specified by your settings.
The illustration above gives a visual of the trail cameras detection area. This also displays how the camera sees temperature variances. With this information in mind it becomes easier to understand that when a subject walks directly toward the camera it may not be seen as it is likely staying in one temperature zone.