Tabulated data on the breeding biology of the black rhinoceros Diceros bicornis compiled from reports in the Yearbook

Gestation period. 463 days, Pittsburgh 1960, male

Gestation period. 465 days, Kobe 1963, male

Gestation period. 469 days, Hanover 1965, male

Oestrous cycle length (in days), 21-45, 17-60, 21, 28, 28-30, 30-35, 18 Oestrous duration (in days), 1-2, 3-4, 5-6, 1-2, 2-3

Gestation period. 458 days, Mysore 1966, male

Gestation period. 419 days, Bristol 1961, male

Gestation period. 438 days, Bristol 1958, male

Gestation period. 438 days, Bristol 1964, female

Gestation period. 462 days, Kobe 1965, male

Male. Age of first mating (years) 4 ? ca.7 Age of first succesful mating 6 ca.7 End

Female Age of first mating (years) 4 ? 9 - 7 Age of first succesful mating 6 9 17 8 End

Duration of copulation (in minutes): 2-20, 5-15, 55, 30, ca.40, 20, 60+, 15-40

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