No specific research has been done on what colours an emu is able to see. Any studies that have been done of bird vision in general indicate that birds can see all colours, including ultraviolet light.
The bird with the biggest neck is a flamingo
eyes
Ostrich and Emu.
No. An emu does not stick its head in the sand. Nor, for that matter, does an ostrich.
The emu's ears are on either side of its head. Emu ears are not easily visible, being just small holes covered by wispy feathers, amidst the blue skin on the side of their head. See the emu ears at the related weblink below.
Both male and female emus have blue on their necks. It is virtually impossible to tell the male and female emu apart by their appearance.
Brolgas are light silvery-grey in colour, with dark legs. They have a scarlet band on the back of their head and neck.
South American rhea, Australian emu, and the African ostrich.
Some people etch emu eggs. Because emu eggs are a deep green colour, with other shades of green revealed underneath, some people are skilled in the art of carving and etching them. This is a highly specialised skill, but the etching reveals new layers of colour: light, dark and in between. To see some amazing carved emu eggs, click on the related link.
An emu will squat down and slowly lower itself to the ground, with its neck folded in on itself. Although the emu sleeps for a total of about 7 hours a night, it will wake up every 90-120 minutes and rise back into the squatting position.
A baby's neck muscles are not strong enough to support the weight of their head. If a baby's head and neck are not properly supported, what can happen is that there will be an injury to the neck and back.
There are 3 regions of the body: Appendicular, Trunk, and Head and Neck Therefore the head and neck is actually its own section.