In contrast, if an alarm call is given for an eagle, the monkeys must get low to the ground and seek a hiding place.
If an alarm call is given for a python, the monkeys must climb into the trees to avoid the python.
The song is a piping "tuh tuh-tuh-tuh-tuh-tuh", and the alarm call is a rolled "wirrri".
It has a variety of harsh calls including a loud, repeated territorial call, a chattering alarm call and a softer trilling call.
It has a shrill "sirrrr" or "tsi-si-si" alarm call, and a thin "tsit" pre-flight call.
Its most-recognised sound is its alarm call which is a rapid "chit-chit-chit-chit", although it has more melodious sounds in its repertoire.
In an emergency the button is pressed, which sends out a coded radio signal to a receiver situated in the home which converts into a simple alarm call.
In residential properties, where families are asleep, the vital life-saving period is between the moment the householder makes an alarm call and the arrival of the fire service.
