Disclosed is a bird deterrent device (1) that emits alarm signals at pre-set and/or random time intervals. The device (1) includes a suitably powered control means (2) adapted to generate alarm signals and feed the alarm signals to an alarm means (3) at pre-set or random time intervals. The control means (2) further includes a signal generating means and a programmable duty cycle means with a random signal generator means. The alarm means (3) is configured to deter or scare birds from settling or nesting in a controlled area.
