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The Shedd Aquarium in Chicago, Illinois, revealed the names and sexes of four Magellanic penguin chicks who were hatched at the aquarium in May.

Video of the four chicks shows them trotting around a pool and chirping.

“The Shedd Aquarium is announcing the names and sexes of four Magellanic penguin chicks (Spheniscus magellanicus) the aquarium joyfully welcomed following a successful nesting and breeding season in May,” wrote the aquarium in a press release.

“Porter, male – named in honor of the aquarium’s founder John G Shedd’s wife, Mary Porter Shedd, by the Shedd family.

“Popi, male – named in honor of Pablo ‘Popi’ Garcia Borboroglu, PhD, who is the founder and president of the Global Penguin Society, an international science-based conservation coalition dedicated to the survival and protection of the world’s penguin species, chosen by the Christopher Kim family and Museful Co.

“Sir Elio, male – fondly named by John and Carrie Morgridge and the Morgridge Family Foundation.

“Dee, female – named in honor of Dr Dee Boersma, who is a University of Washington professor of biology and founder and director of the Center for Ecosystem Sentinels, chosen by Shedd Aquarium’s animal care team.”

The aquarium previously released video of the penguin chicks’ first swim in August. Credit: Shedd Aquarium via Storyful