Greater One-horned Rhinoceros
Rhinoceros unicornis
65 cm (range 60 cm–70 cm)
Entire length of the fully erect penis during manual semen collection from one unsedated captive adult male (30 years old, Lincoln Park Zoo); reported as a 60–70 cm range; midpoint used

In the single rhinoceros measured erect, lateral folds 20–25 cm long opened out from the middle of the penis into cupped projections.
Margin note: Comes with optional wings.
Sources
- Schaffer N.E., Beehler B., Jeyendran R.S., Balke B. (1990) Methods of semen collection in an ambulatory greater one-horned rhinoceros (Rhinoceros unicornis). Zoo Biology 9: 211–221 doi:10.1002/zoo.1430090304
- Bhattacharya M., Chakraborty A., Baishya G., Dey S. (1992) Glans penis of the Indian one-horned rhinoceros (Rhinoceros unicornis). Indian Journal of Animal Sciences 62(10): 950–951 link
- Laurie W.A., Lang E.M., Groves C.P. (1983) Rhinoceros unicornis. Mammalian Species 211: 1–6 doi:10.2307/3504002
- Cave A.J.E. (1964) The processus glandis in the Rhinocerotidae. Proceedings of the Zoological Society of London 143: 569–586 doi:10.1111/j.1469-7998.1964.tb03882.x
- Groves C.P. (1972) Ceratotherium simum. Mammalian Species 8: 1–6 doi:10.2307/3503966
Drawn from
- Cave 1964, Pl. 2 fig. 1: Drawing of the glans of Rhinoceros with its processus glandis: a long, narrow, lanceolate flap attached lengthwise along the side of the glans
- Bhattacharya et al. 1992, Figs 1–2: Photos of the excised glans with a ruler, showing the 'half-bloomed bud' free tip and the urethral orifice
- Schaffer et al. 1990, Fig. 1 (supporting only): Schematic line drawing of the semi-erect penis held for semen collection, lateral; shows the caudal curve and the tip
See it at true size on your screen · Human vs Greater One-horned Rhinoceros