The birth of a baby black rhino at Chester Zoo in the UK is cause for rejoicing. With a global population of less than 1,000, the eastern black rhino is critically endangered. The calf’s birth was captured on camera, after mom Ema Elsa endured a 15-month pregnancy. “These rhinos have been pushed to the very edge of existence, and every single addition to the European endangered species breeding program is celebrated,” said Andrew McKenzie, team manager for rhinos at Chester Zoo. The zoo is part of global conservation efforts to prevent the extinction of this species.