According to this
Huffington Post story, this baby elephant cried for five hours straight after his mother attacked and abandoned him.
Quote:
Shortly after the mother elephant gave birth to the calf in August at the Shendiaoshan Wild Animal Nature Reserve in Rongcheng, China, she stepped on him, according to Metro U.K. Veterinarians hoped it was an accident and treated the baby before returning him to the mother, but he was attacked again. So they removed him from her.
"The calf was very upset and he was crying for five hours before he could be consoled," an employee said, per Metro. "He couldn’t bear to be parted from his mother and it was his mother who was trying to kill him."
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The article does note that it's hard to know whether this calf was actually expressing emotion, but that elephants are highly expressive creatures in general.