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Oryctes rhinoceros
Scarabaeidae; Dynastinae; Oryctini; Oryctes; Oryctes rhinoceros (Linnaeus, 1758). This is a female. It has not much more than just a suggestion of a horn and the posterior segment of the abdomen is "hairy". The male has a very long horn and the last segment of the abdomen is shiny and hairless. Wikipedia explains it much better, but my third and fourth photos, hopefully, show these characteristics.
This beetle was spotted on its back, in our backyard on a smooth, flat rock. These beetles are immensely strong, but their strength does not help them if they tumble unto their backs on a smooth surface (if they cannot grip onto the surface with their claws, they just cannot right themselves and may die in that position). I should have taken a picture of this one, on its back, to show the ventral view, but I could not resist turning it the right way up to relieve its stress. So, dorsal views are all that I got.
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