The Euro is also called a Wallaroo.  In central and Western Australia, it is reddish and is referred to as a Euro, while in eastern Australia it is grey and called a Wallaroo, but they are similar animals.  They are both of the same species; Macropus robustus, but the one called a Euro has the sub-specific name of erubescens,while the Common Wallaroo is Macropus robustus robustus.

Size

A Wallaroo is sometimes described as being smaller than a Kangaroo, but bigger than a Wallaby. However, this definition is far from perfect, because there are some quite small animals in the Kangaroo group called Kangaroo, such as the rat Kangaroo and the Tree Kangaroo.  A male euro can get to 50 Kilogram in weight while the females are rarely more than half that.  Male Euros can be 4 feet tall.

Habitat

The Euro is an arid zone animal.  They tend to live in hilly areas and will use caves of the shade of rocks as shade during the day, preserving their water.

Water

They are less dependent on free water than the Red and Grey kangaroos.  They get much of their water from the food they eat.  There are very few animals that dig for water. Elephants do this in Africa, and the Euro in Australia willalso dig for water.

Competition with Kangaroos

Although there is a certain amount of competition between Euros and the larger Reds and Greys, this is reduced by the preference of the Euros for hilly areas and of the larger species for the open plains.

Gait

Like the Wallabies, Euros are more upright in their hopping than Kangaroos.  This looks slightly less efficient on flat ground, but is admirably suited to their hilly and rocky habitats.

Food

Euros, like all Kangaroos alive today are herbivores.  They prefer grasses rather than either shrubs or herbs.  Their diet is subtly different from the larger species of Kangaroo although there is a lot of overlap.  The Euro has an adaption that allows them to recycle some of their waste Nitrogen so they can get by on less protein than most animals.

Aggression

Male Euros can certainly be quite aggressive to each other in competition for females.  They can also defend themselves against dogs and other predators, but an attack on humans is very rare. 

However, this can happen in some circumstances.  For a true account of a dangerous attack on a woman not in a position to defend herself, but who received aid from an unexpected direction, see The Unlikely Hero.