Simplify the following text for a Grade 8 native English-speaking person.
Original: It is the only member of the monotypic genus Bubulcus , although some authorities regard its two subspecies as full species , the Western Cattle Egret and the Eastern Cattle Egret .
Simplified: It is the only member of the genus Bubulcus , with two subspecies , the Western Cattle Egret and the Eastern Cattle Egret .