For terrestrial and arboreal animals sight is probably the one sense that most cannot do without as it is important in movement, finding food and seeking out danger. An animal may be able to hear and scent danger but the problem will arise when it tries to flee and cannot see where it is going.
Animals rely on sight to find food, seek signs of danger and to check sexual readiness. Spotting something suspicious will result in an alarm call that will alert all the in the groups and in the vicinity. This will then ensure that all the animals in the area are alert and looking out for the danger allowing for a better chance of locating the danger.
Sight is used in the mating game when Baboon females swell on their rear ends when they are in heat. This allows the males to check their readiness. The swelling reddens as the female comes into heat and she may be mated by a number of subordinate males during this time.
There is no chance of her falling pregnant from them for when she is at time her swelling is at it reddest and the dominant male will then prevent all others from mating with her. Scent will also play a part here.
Black Rhino are known to run toward sounds and movement. They have good hearing and scent but as they do not have good eyesight they run toward a disturbance to get a closer look. This behaviour may be one of the causes of their decline in the past 50 years. Poachers will make a noise to attract the Rhino closer for a better shot at it.
Insectivorous Bats will hunt by echolocation where they produce very high frequency pulses and listen for the echoes. They can pinpoint the distance and size of their prey. The Bush Baby has large immovable eyes that allow for maximum light to penetrate. It is able to jump between trees without problem.
By Leigh Kemp