Emus are a species of flighless birds from Australia.
It is tall and blue.
Scooby-Doo! And The Legend Of The Vampire
When Shaggy was using his binoculars, an emu walked towards them and attempted to maul them. When the emu tried searching for them, it saw Shaggy and Scooby putting their heads in the grounds like ostriches and it thought they were birds and left.