🔥 Trending Gorilla Tragedy at Zoo Basel: Father Kills Baby, Another Gorilla Dies

Recent Tragedies and Changes in the Gorilla Group at Zoo Basel

Zoo Basel has experienced significant events concerning its gorilla group, including the arrival of a new silverback and subsequent tragic deaths and injuries. These incidents highlight the complex social dynamics of gorillas, especially in a zoo environment.

Arrival of Silverback Yeba

In October 2025, a new gorilla silverback named Yeba (13 years old) arrived at Zoo Basel from Zoo Thoiry in France ¹. Yeba was brought in to succeed the previous silverback, M'Tongé, who had to be euthanized in June 2025 ¹⁷. Yeba's integration into the existing gorilla group in the ape house was initially reported as successful ³⁵. He was expected to take over leadership of the troop ⁵.

Tragic Deaths and Injuries

Despite the initial successful integration, the gorilla group at Zoo Basel faced a series of tragic events shortly after Yeba's arrival.

Death of a Four-Day-Old Infant

On an unspecified date, a four-day-old gorilla infant, born to female gorilla Joas, died after being fatally injured by Yeba ²⁴¹⁰. The zoo announced this on a Wednesday, following the incident on Tuesday ⁴. This event drew significant attention to the complex social dynamics within the gorilla troop ⁹.

Death of an Adult Female

On the same day as the infant's death, an adult female gorilla also died ²⁶⁹. Sources indicate that this death was also linked to an attack by the silverback ⁹.

Euthanasia of Mobali

Further tragedy struck when an 11-year-old male gorilla named Mobali had to be euthanized ⁸. Mobali sustained serious injuries, specifically a bite to the genitals from Yeba, which prevented him from urinating ⁸. This incident occurred after the deaths of the infant and the adult female, marking a difficult period for the zoo's gorilla population.

Context and Implications

These incidents underscore the challenges of managing gorilla groups, particularly when introducing new dominant males. While Yeba's integration was initially deemed successful ³, the subsequent events demonstrate the unpredictable and sometimes violent nature of gorilla social structures, especially during periods of hierarchy establishment. Zoo officials faced difficult decisions regarding the welfare of the animals following these attacks ⁶.