Only one: Bos primigenius taurus.
Um there are terradactle and tropical cows
British.
Cows are divided into BREEDS, not species. And what makes each BREED of cows different is colouration, body type and shape, presence of horns or not, and size of horns.
Australian's terms for cows and cattle are pretty much the same as what North Americans and British call them: cows.
There are about 220 species of Artiodactyla
There are no chicken in cows. Chickens and cows are two very different species, and neither is found inside the other, or even consumed by the other.
Cows cows cows.
No, only the "female cows" do. Male "cows" are not cows. They are bulls or steers, which do not produce milk. Female bovines that have had a calf (or at least two) are called cows and those cows produce milk. Young female bovines that have not had a calf are called heifers, and they are not able to produce milk because they have not had a calf yet.
No, because they are both the same species. They will both use the same communication.
No. They beller or moo, they never screech. Cougars, cats and owls (at least a couple species of owls do) screech, not cows.
Definitely not. Cows (being cattle) are much smaller and lighter than any species of elephant.
The genus and species of dairy cows commonly used for milk production is Bos taurus.