The female swamp deer of the duo that was brought to Byculla zoo last year has died of cardiac arrest. The zoo officer said the deer may have been injured during mating. Now, zoo officials are trying to bring in more swamp deer and a mate for the male deer.

As per information from an officer at the zoo, the deer was in good health and its activities were normal. But, on Friday morning, it was found unconscious. There was the big mark on its chest. The post mortem report mentioned that the death was due to cardiac arrest and respiratory failure.