The newest giraffe at Dallas Zoo has millions of fans just days after its birth thanks to a camera streaming live video of the calf playing and nuzzling with its mother.

The female calf was born on Friday afternoon - weighing 139lb and standing 5ft 10ins tall.

The zoo allowed US cable television channel Animal Planet to install the video, which has been operating since last week to enable viewers to watch for the birth and the calf.

"It was a big decision for us," zoo spokesman Laurie Holloway said. "As a leading zoo now, we decided it's very important to tell people what's really going on behind the curtains."

The unnamed calf is healthy and has been playing and nursing, she said: "It's amazing how quickly they get up and run."

As of yesterday morning, the TV channel's website already had more than 2.1 million viewings of the streaming video, allowing viewers to see scenes such as the calf nuzzling to nurse from her mother, Katie.

The towering mother giraffe at times leans over to lick and gently nudge her baby.

The Dallas Zoo giraffe population is now 13 with the addition of the calf, Ms Holloway said. The father is named Tebogo.

Zookeepers will choose three potential names for the calf, all related to African heritage. A public vote will be taken to choose the winning name.