Video of the parrot, taken from a security camera inside a Mickleham home, shows the macaw screaming as thieves attempt to break in.
The screams become louder and louder, as the parrot becomes more distressed.
It's believed a break-in was attempted at the property just before midnight, triggering the parrot's reaction.
The high-pitched screams were enough to cause the intruders to flee.
The parrot's owners caught the reaction on a security camera in their loungeroom.