The zoo is located in rural Harpursville, 15 miles (24.1 kilometers) northeast of Binghamton in upstate NY.
The newborn stood up on his wobbly legs about 45 minutes after he was born. The calf was walking and nursing not long after its birth.
According to The Associated Press, at least 1.2 million people watched the event on Animal Adventure Park's YouTube page.
"His entrance into the world was unnerving to even those of us who have witnessed animal births previously", said Jordan Patch, Animal Adventure Park owner.
Ever since April the giraffe went viral, zoo officials have said they would hold a social media contest to name the newborn. The proud father, a five-year-old named Oliver, watched from an adjacent pen. This is his first offspring.
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April gave birth to a healthy male calf Saturday at the privately-owned Animal Adventure Park before an online audience of more than a million viewers.
April the giraffe has been an internet sensation since February.
Adventure Park's YouTube streaming of 15-year-old April the giraffe is capturing the moment live.
Almost five millions viewers a day were watching the livestream at its peak, The New York Times reported. People around the world have been tuning in daily, with some growing impatient as the pregnancy seemed to drag on. Unlike humans, giraffes are pregnant for up to 15 months! The money will be used for the care of the animals.
Its gender was not yet known, and its name will be determined through a competition run by the park. Patch blamed "a handful of extremists and animal rights activists" for the interruption.
Animal Adventure is in rural Harpursville, New York.