Both the cow and heifer belong to the Bovinae taxonomic classification subfamily. As such, they are classified as bovines. “Cow” is the colloquial term for “cattle” and is considered as the most widely occurring large, domestic ungulates (hoofed animals, other examples are camel sand oxen). “Heifer,” although this term is not commonly used and known by the majority, is a particular type of cow that has some physical differences.