Not the scent of cucumbers, but to my sense of smell, much more musky, more like skunk scent or etc., but sometimes with distinctive odor.

Once, while skinning refrigerated Sunday-killed rattlesnakes on Monday night, I left one on the counter while answering a long phone call, during which a I heard a small "thud", and then "rattling" --- one of the decapitated snakes had sort of reanimated, and worked its way off the counter and fallen to the floor ... This was very disconcerting, as might be imagined... During the course of this process, I learned that like other snakes, rattlers have glands from which they can emit, sometimes forcefully, a foul-scented fluid, which I have occasionally smelled in the field --- always an occasion for pause...