Heartbreaking video shows a mother sea lion crying as she mourns the loss of her baby

• Mammal captured howling next to her dead pup on beach in San Diego


• The baby was believed to have been born prematurely earlier this week 


• Wildlife campaigner who filmed video returned the next day to find that the mother had stayed with her baby overnight

 

Heartbreaking video shows a mother sea lion crying as she mourns the loss of her baby