Crested Pigeon

Phaps chalcoptera

Appearance:
Grey-brown plumage
Grey head with slender, black crest on top
Red-orange eyes with pink-red ring around them 
Black striped wings with bronze visible
Colourful areas of brown, purple, blue and green on primaries

Learn more about the Crested Pigeon.

Laughing Kookaburra

Dacelo novaeguineae

Appearance:
Large kingfisher 
Large, creamy-white head
Dark brown stripe through each eye 
Brown stripe over the top of the head
Very large bill, black on top / bone coloured on bottom
Creamy-white underparts 
Brown wings and back 
Sky blue spots on shoulders
Rusty reddish-orange tail, with dark brown bars 

I don't know about gum trees but Kookaburras certainly like to sit on hydro wires.  We spotted at least one of them each day as we drove around Tasmania. I never heard any laughter though. They were all sitting quietly on their perch looking out over the world.

Learn more about the Laughing Kookaburra.