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Brookfield Zoo Dolphin Calf Dies Four Days After First Birth in 10 Years

A necropsy is under way to pinpoint the cause of death

Bottlenose dolphins Allie and Tapeko are joined by a newly born calf at the Brookfield Zoo Chicago on June 7, 2025. (Brookfield Zoo Chicago)
File photo.
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Overview

  • The male bottlenose calf was born to first-time mother Allie on June 7, marking the zoo’s first such birth since 2014.
  • Despite around-the-clock monitoring and initial healthy development, staff observed a sudden behavioral change and the calf became unresponsive on the evening of June 11.
  • The zoo announced the calf’s death on June 12 and said the cause remains unknown pending necropsy results.
  • Veterinarians and animal care teams are continuing to closely monitor Allie and the rest of the dolphin pod in the Seven Seas habitat.
  • Brookfield Zoo officials plan to use insights from the calf’s birth and loss to advance scientific understanding of dolphin neonatology and care.