Simplify the following text for a Grade 8 native English-speaking person.
Original: The Western Grey Kangaroo ( Macropus fuliginosus ) is a large and very common kangaroo or macropod , found across almost the entire southern part of Australia , from just south of Shark Bay to coastal South Australia , western Victoria , and the entire Murray-Darling Basin in New South Wales and Queensland .
Simplified: The Western Grey Kangaroo ( Macropus fuliginosus ) is a large and very common kangaroo or macropod , found right across the southern part of Australia . They are found from just south of Shark Bay in Western Australia to western Victoria .