The Woop Bird.

Aka, Bronze Wing Pigeon.

Bronze Wing Pigeon.  Blue Mountains, New South Wales.

A flock of these ground loving pigeons have taken up permanent residency in our garden.  Usually they scrounge around in the leaf litter on the south side of the house. 

This morning I was startled by this one on the north-western side.

The human residents of the same plot of ground call these birds Whoop Birds because that's the sound they make when calling.

A bird bath is always on hand for them because they love to drink from it, especially in hot and humid weather.