The babies will be named after undergoing medical exams in another eight to 10 weeks to determine their sex, said zoo officials in Guadalajara, Mexico's second city.
The Guadalajara Zoo is the first in Latin America to get Adelie penguins to reproduce, said its chief penguin veterinarian, Luis Soto.
The species, Pygoscelis adeliae, is the chubbiest of all penguins, and is found in the wild only in Antarctica.
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To get Blanquita and Pippin to reproduce, the zoo had to make a mini-Antarctic in their enclosure, with below-freezing temperature, real snow, saltwater tanks for them to swim in and special lighting to imitate the southern sun.
The first baby penguin, born on December 24, weighed three kilograms (six pounds 10 ounces) at birth. The second, born two days later, weighed 1.96 kilograms.
Their parents arrived in Guadalajara in 2015, from another zoo in Japan.
Adelie penguins grow to a height of up to 80 centimeters (two feet seven-and-a-half inches) and are known for the white rings around their eyes.
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