Eld's deer (Panolia eldii), also known as the thamin or brow-antlered deer, is an endangered species of deer indigenous to southeastern Asia. The species was first discovered by westerners in Manipur in India in 1839. The original scientific name Cervus eldi was coined in 1844 in honour of Lt. Percy Eld – a British officer.^{[citation needed]} There are three subspecies of the Eld's deer:

The following measurements have been reported for the Eld's deer:

The deer are generally of medium size and are similar to size and shape of the Barasingha. The species have very regal and graceful Cervus physique. Its legs are thin and long, has a long body with a large head on a thin neck. The throat of the males have a thick mane of long hair. Stags are bigger and heavier than the females. Their coat, rough and coarse, changes colour with the season; in summer the colour is [reddish brown while in winter it turns into dark brown with males tending to be darker than the females. The tail is short in length and rump has no distinct patch. Despite these features, they're actually related to the Père David's deerThe antlers, bow or lyre shaped, don't grow upwards but tend to grow outwards and then inwards; a smaller branch grows towards the front of the head. The brow tine is especially long and noticeable. The Brow-antlered deer is so named since they have a long brow tine.They shed their antlers every year with the largest size attained during the breeding season.