Gestation period. 463 days, Pittsburgh 1960, male
Gestation period. 454 days, Pittsburgh 1963, male
Gestation period. 457 days, Pttsburgh 1965, male
Pair bought from Carl Hagenbeck on 23 May 1954. Male estimated 2 ? years old, female 3 years old. Calves were born: male in Oct 1960, male in April 1963 and male in Oct 1965. Firs calf sent to Jacksonville, second to Duluth.
Pittsburgh Zoo. The only signs of oestrous appear to be enlargement of the vulva and receptivity to the male's advances. In every case, only one copulation occurred during each oestrous.
Pittsburgh Zoo. Pair bought 1954. Male estimated 2 ? years old, female 3 years old. In 1957 attempts at mating were observed. Two complete acts of copulation were seen in 1958 but the female did not become pregnant. In 1959 one complete act of copulation occurred, followed by another 50 days later when the female became pregnant.
Pittsburgh Zoo. Mating has taken place in May, September and November. Sexual union lasted for over an hour and the male was observed ejaculating about every 10 minutes during copulation. After mating the male ceased to be interested in the female.
Pittsburgh zoo - 3 males born, birth weight estimated between 22 and 34 kg.
