Hello, what I need to measure is how long a snake's head spends inside a certain zone. The zone in this case is a prey trail (a few inches wide), so I want to see how long the snake's head is within the confines of this trail (i.e. how interested is the snake in the prey trail). When the head is outside the specified zone, that time doesn't count. I need to count how many seconds the head is within the prey trail. Can Tracker do this? I've been playing around with it but can't seem to figure it out. Thank you.