CHICAGO -- A penguin born at Shedd Aquarium is a boy, genetic tests show.
Chick 23, born on June 9, 2015, is the 23rd rockhopper penguin born at the Chicago's Shedd Aquarium. His gender was determined during a recent checkup.
He weighs about 4.5 pounds at three months and is almost as tall as an adult bird.
It's a boy! Shedd Aquarium reveals baby penguin's gender
Lana Vanagasem, manager of penguins, sea otters and dogs, with Shedd’s newest rockhopper penguin, Chick #23. (Shedd Aquarium)