If a model is capable of flight it will have the special rule 'Fly' in its entry in the relevant Army book. For the sake of convenience these models are referred to as flyers'. Flyers follow all the rules for normal units, except for the differences described below.
There are two types of flyers: flying monsters and flying units. They share the same rules apart from a few exceptions for flying units, which are given later. All flying models are mounted on square bases like other troops in Warhammer. This is more convenient and makes it easier to resolve close combat between flyers and other units.