Mammalclass.as

class Mammal {

   private var _gender:String;
   private var _name:String = "Mammal";

   // constructor
   public function Mammal(gender:String) {
       this._gender = gender;
   }

   public function toString():String {
       return "[object " + speciesName + "]";
   }
   public function play():String {
       return "Chase another of my kind.";
   }
   public function sleep():String {
       return "Close eyes.";
   }

   public function get gender():String {
       return this._gender;
   }
   public function get speciesName():String {
       return this._name;
   }
   public function set speciesName(value:String):Void {
       this._name = value;
   }

}