Two African penguin chicks hatched earlier this week at the Minnesota Zoo, bringing the exhibit's penguin population to 34 with more on the way, the Star Tribune reports.
The zoo says "Albert" and "Walter" were born on Sunday and Monday and both weighed close to 3 ounces.
The gray balls of fur are the second pair of chicks hatched at the zoo in its history. The first pair hatched in March were cared for behind the scenes before making their debut in July.
Like most other penguin species, African penguins are endangered in the wild. The zoo says oil spills, historical hunting and destruction of their habitat have killed 80 percent of the population in the last 50 years.
The zoo's penguins are in good hands thanks to University of Minnesota veterinarians, who recently recently performed their first penguin MRI. The procedure helped cure "Fluffy," a middle-aged penguin, of infection.