Emu Group Bird EMU physic is: 8 to 10 inches tall at birth, with black and white stripes. As 3-month-old chicks, they turn nearly solid black and change into a tan, brown and black mixture as adults, some having a bluish neck. With loads of feathers on the body part, they are the fastest runners, who can catch the speed up to 60-70 Km/h in short bursts.