"Saying goodbye to a subspecies, the very last male Northern White Rhino.It survived 55 million years & saw ice ages, earthquakes, meteor strikes & was a testament to innumerable historical changes on the planet. It could not survive humans.The great beast is now functionally extinct."

It is common usage in English to refer to it as a baby, even in utero. Just ask your mother. But you do bring up an important question, when is it a baby? Dont say "at birth", my son's best friend was born at 28 weeks in an emergency c section because of a car accident. He is a good kid and no less of a person because he wasn't born at 40 weeks.
Sheldon Cooper companion.
#42 *drown