Vahana

Vahana (Sanskrit: वाहनं) are the animals on which a particular god sits or rides on.

Symbolism
In Hindu iconography, positive aspects of the vehicle are often emblematic of the deity that it carries. Nandi the bull, vehicle of Shiva, represents strength and virility. Dinka the mouse, vehicle of Ganesha, represents speed and sharpness. Parvani the peacock, vehicle of Skanda, represents splendor and majesty. The hamsa, vehicle of Saraswati, represents wisdom, grace and beauty.

Bull
Nandi is the vahana of Lord Shiva. Nandi is actually a bull on which Shiva mounts on. Nandi is also Shiva's right hand.

Rat
Mooshika is the vahana of Lord Ganesha. Mooshika is actually a rat on which Ganesha mounts on. He is also Ganesha's best friend.

Owl
An owl is the vahana of Goddess Lakshmi. The owl on which Lakshmi mounts on has no specific name but it is believed that an owl is Lakshmi's Vahana.

Swan
A Swan considered as the Vahana of Goddess Saraswathi. Swan is the symbol of wisdom, grace and beauty.

Lion
Lion is considered as the Vahana of Goddess Durga or even Goddess Parvathi at times. Since, lion is a ferocious animal, it symbolises courage, justice and power.

Tiger
Tiger is considered as the Vahana of Lord Ayyappa. A tiger symbolises willpower, strength etc.

Eagle
Garuda is the eagle on which Lord Vishnu mounts on. Eagle is the symbol of honesty and truthfulness.

Buffalo
Yama Deva mounts on a buffalo. A buffalo symbolises level-headedness, detemination and confidence.

Peacock
Parvani is the peacock on which Karthikeya mounts on.