Amur Tiger Nikolai
Utah’s Hogle Zoo mourns the passing of Amur tiger Nikolai
Utah’s Hogle Zoo is deeply saddened to share the passing of male Amur tiger, Nikolai, who passed away on November 14, 2025. Over the past few months, Nikolai developed urinary and bladder issues. His care team monitored him closely, tried different medications, and consulted with specialists to understand the cause. During a full veterinary exam in late October, his team observed that his bladder was enlarged and began working on a treatment plan.
Despite immediate, advanced care, including fluids and medications, Nikolai’s condition continued to decline. At 15 years old, he was considered a senior tiger, which can make recovery more challenging. After another sudden decline on November 14, Nikolai passed away.
Nikolai, or “Nik”, came to Hogle Zoo in 2018 from Denver Zoo, along with his green emotional support enrichment barrel. He had a knack for choosing the perfect resting places, usually right by the viewing window or in his favorite cave, giving guests unforgettable up–close moments with him. Behind the scenes, Nik was known as an “old man” tiger who loved his routines, his meals and his favorite napping spots. He had a select group of care team members he chuffed for, and everyone else was accepted so long as they showed up with snacks. Nikolai had a bit of a mischievous streak, but even with his sass, he was always a willing and dependable partner during training sessions.
Nikolai also played an important role in conservation efforts alongside Sasha, our female Amur tiger. Nik and Sasha came to Hogle Zoo on a breeding recommendation from the Association of Zoos and Aquariums (AZA) Amur Tiger Species Survival Plan (SSP). In spring 2025, they were introduced for their first breeding season. The pair showed encouraging behaviors such as vocalizing to one another, resting near each other, and demonstrating positive signs of comfort in shared space. Nikolai’s care team described him as “ever the gentleman” during introductions with Sasha.
While Sasha did not have cubs, successfully introducing Amur tigers was an important accomplishment for both the team and the animals. We will work with the Association of Zoos and Aquariums (AZA) and the Amur Tiger Species Survival Plan (SSP) for future breeding recommendations for Sasha. Guests can continue to visit Sasha in Asian Highlands.
Nikolai made an impression on everyone who met him. Losses like this affect our entire zoo family, our community, and the many guests who formed their own connection with him. We are grateful for the compassion and support shared with our team and ask that our community continue to be gentle with the people who cared for him so deeply.
About Amur tigers
Amur tigers, also known as Siberian tigers, are the largest of all tiger subspecies and among the most endangered. With fewer than 600 left in their natural habitat, they survive in the dense forests of Russia and northeastern China, where their survival is threatened by habitat loss, climate change, and poaching.
AZA-accredited zoos, including Hogle Zoo, participate in the Amur Tiger Species Survival Plan to support the long-term future of the species through responsible breeding, research, and conservation partnerships that protect wild populations.
Animal Wellbeing
Hogle Zoo is committed to providing excellent animal wellbeing through individualized healthcare plans, including advanced care if resident animals experience rapidly declining health.
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