Uma's vehicle is the cow which she shares with her swamy.Why is durga alone and on beasts.?

Question

Since it is the wildest of wild beast like tiger and lion that Durga sits on;she is difers in her ability to bless,kali the mother of incesstancy is even less able.

The cow stands for calmnes and gentleness of the human heart.

Pasu ,pathi.pasam is not in sanscrit literature.Vaganam is vehicle(human heart) where The Lord sits on and the transporter an instrument of GOD.

Answer 1

FIRSTLY, They are all called VAHANAs.

Vahana is the being or object that serves as the mount or vehicle of a deity in Indian mythology. Vah in Sanskrit means to carry or to transport.The vahana of a deity can vary according to the source, the time, and the place. In popular tradition, the origin of each vahana is told in thousands of different ways.

Deities almost always have an animal for a vahana. The vahana is sometimes real, sometimes mythological, and sometimes a composite.In iconography, the vahana is both the symbol and the emblem of the deity that it carries. Nandi the bull, vahana of Shiva, represents strength and virility.

As the assistant of a deity, the vahana serves the function of doubling his or her powers. Durga the warrior could not have destroyed the demon Mahishasura without the aid of her mount, Manashthala the lion.

SECONDLY, Uma another name of Goddess Parvati's vahana is Lion. As already told, Durga the warrior could not have destroyed the demon Mahishasura without the aid of her mount, Manashthala the lion. Lion is depicted to double her power. Durga talkes this vahana only when she has to fight the evil to protect the world and good. Cow is NOT the Vahana of Uma or Parvati. Bull (Nandi) is the vahana of Lord Shiva and whenever he is seen with his consort Parvati, both of them share the Bull. -

Answer 2

Durga is alone and on beasts because the writers of these mythology made it like that.