According to the latest report from the Central Zoo Authority (CZA), approximately half of the animals at Byculla zoo, with birds being the majority, died due to cardiac arrest, with around 10 per cent succumbing to respiratory issues. Concerns have been raised by citizens regarding the high percentage of deaths. 58 per cent deaths were attributed to cardiac arrest and approximately 10 per cent due to respiratory problems at Byculla zoo. However, the zoo management contends that these occurrences are commonplace, often resulting from animal conflicts or natural aging processes.

Trustee of Watchdog Foundation Adv Godfrey Pimenta expressed concern over the alarming deaths and causes of death of animals and birds. According to the data 
which was published on the Central Zoo Authority website, a total of 50 animals (including birds) died at Byculla Zoo due to various reasons. Of the 47 deaths, 33 were birds, and 17 were mammals. 10 of the 17 mammals that died were members of the deer family.