This week's tweeter is the Brown Falcon.

It's a medium-sized bird of prey, measuring about 40- to 50-centimetres. And, like its close relatives, females tend to be larger than males.

If you see it perched on a fence post, you might notice its distinctive, dark "tear-drop" stripe running down from the eye.

It hunts creatures such as small mammals, birds, lizards, snakes and insects across Australia and New Guinea.