Allie, a 38-year-old bottlenose dolphin and experienced mother of four, gave birth to the calf — which will be named later this summer — at 12:22 a.m., the zoo said in a news release.

The successful birth marks a major milestone for the zoo’s dolphin program Bottlenose dolphins ‘Allie’ with ‘Tapeko’ are joined by the newly born calf at the Brookfield Zoo Chicago recently.

Volunteers and caretakers apply petroleum jelly to keep rough-toothed dolphin Yang Yang hydrated before lifting her on a stretcher for release into the ocean off Sanya, China, on Sunday.

CHICAGO — A bottlenose dolphin at a Chicago zoo gave birth to a calf early Saturday morning with the help of a fellow mom, in a successful birth recorded on video by zoo staff. The dolphin calf ...

CHICAGO — A bottlenose dolphin at a Chicago zoo gave birth to a calf early Saturday morning with the help of a fellow mom, in a successful birth recorded on video by zoo staff. The dolphin calf was ...

CHICAGO — A bottlenose dolphin at a Chicago zoo gave birth to a calf early Saturday morning with the help of a fellow mom, in a successful birth recorded on video by zoo staff. The dolphin calf ...

Rough-toothed dolphin Yang Yang is returned to the sea in Sanya, South China's Hainan province, June 8, 2025. [Photo/Xinhua] Yang Yang, a rough-toothed dolphin, was successfully returned to the ...