Saint Louis Zoo will soon welcome new baby black rhino

ST. LOUIS, MO (KTVI) - With Mother's Day just around the corner, the Saint Louis Zoo is doing a week of posts in honor of animal moms and their babies. They kicked off the week with a big announcement: the pregnancy of their critically endangered black rhino, Kati Rain.

It will be the second offspring for Kati Rain, who is due any day, and father Ajabu.

Black rhinos weigh in at more than one ton. This species has two horns made of keratin, the same material that makes up human hair and fingernails. They have been pushed to the brink of extinction due to illegal poaching for their horns, and also due to loss of habitat.