Three - month - old Western male Gorillas appeared for first time in exhibit . Pair were born just 48 hours apart in captivity to Layla and robin , both twins . they join 17 other gorillas , including Ernie , robin , who is related to them both .
Three-month-old Western Lowland Gorillas pictured for first time in exhibit . Pair were born just 48 hours apart in January to Layla and Kumi , both 16 . Will join 17 other gorillas , including Ernie , 32 , who is father to them both .