A 5-day old baby hippopotamus, born on Halloween Day Oct. 31, looks around while next to his mother, 10-yr. old Mara, at the Los Angeles Zoo on Tuesday, Nov. 4, 2014. Mara was on birth control but zoo keepers had a hunch she was pregnant when she began gaining weight and had other symptoms. The father, 3-yr. old Adhama, came from the San Diego Zoo in June 2013. The baby’s sex is not known yet and it does not have a name as well. (Raul Roa / Staff Photographer)
A 5-day old baby hippopotamus, born on Halloween Day Oct. 31, rests while next to his mother, 10-yr. old Mara, at the Los Angeles Zoo on Tuesday, Nov. 4, 2014. Mara was on birth control but zoo keepers had a hunch she was pregnant when she began gaining weight and had other symptoms. The father, 3-yr. old Adhama, came from the San Diego Zoo in June 2013. The baby’s sex is not known yet and it does not have a name as well. (Raul Roa / Staff Photographer)
A 5-day old baby hippopotamus, born on Halloween Day Oct. 31, rests next to his mother, 10-yr. old Mara, at the Los Angeles Zoo on Tuesday, Nov. 4, 2014. Mara was on birth control but zoo keepers had a hunch she was pregnant when she began gaining weight and had other symptoms. The father, 3-yr. old Adhama, came from the San Diego Zoo in June 2013. The baby’s sex is not known yet and it does not have a name as well. (Raul Roa / Staff Photographer)