The white circles around the colored dots are the animals awareness. The larger the circle becomes, the more aware the animal is of your presence. To make the circle smaller you must crouch and slowly move forward. Pausing for a moment will also help the circle decrease in size. Avoid making sudden movements or making too much noise which will cause the circle to grow larger. If the circle becomes too large, the animal may run away or attack you.
The following colored dots signify the corresponding animal types:
DOT COLOR - ANIMAL TYPE Green dot - The animal you are currently hunting Yellow dot - A harmless animal and not your current target. Red dot - A dangerous animal that will attack you if get too close.