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  • To detect the pheromones in that urine some mammals touch the liquid and do a distinctive, mortifying, lip-curling grimace called flehmen.


  • Rupert nosed her from behind, his lip curled back in the half-pornographic, half-comical flehmen response, pushing cows and calves out of his way.

    The Dirty Life

  • Even better than flehmen is keeping the outside of the nose nice and moist.


  • Rhinos, elephants, and other ungulates flehmen regularly; so do bats and cats, which have their own species variations.


  • Humans may have vomeronasal organs, but we do not flehmen.


  • With mouth wide open, he looked like a dirty old man, testing the tannins of the progesterone equivalent of red wine with his flehmen grimace.

    The Elephant's Secret Sense

  • They may open their mouths slightly and make sniffing noises - lions, bulls and many other species will curl their upper lips after sniffing a female in heat, the behavior being termed the "flehmen reaction."

    Homepage | INFORUM | Fargo, ND

  • The teeth-bared grimace is not a dog-like snarl, it is the cat's flehmen reaction - one way in which a cat analyses scent signals.

  • There seems to be titillating flirtation that transpires -- vocalization, sniffing, nuzzling, nipping, or flehmen response -- all of which involve the stallion seeing and interacting with a mare's head and forebody. News

  • "Interactive behaviors include quiet affiliation or 'tending,' approaching and retreating, olfactory investigation of urine and feces, flehmen response, and the precopulatory teasing sequence of mares in estrus," says McDonnell. News


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  • To inhale with one's upper lip curled back according to NPR's Says You!.

    May 20, 2017

  • I clicked on this word because it looked familiar; am now frightened, wondering what I must have been reading!

    July 19, 2008

  • "Mating for giraffes is year round, and a female's estrus occurs about every two weeks. The male will test her receptiveness doing what is known as flehmen. Here's where it gets gross. The male will induce the female to urinate. He will then scoop up some of her urine, and taste it like a fine wine. If all tastes well, the chase is on."

    - 'Seven More Bizarre Mating Rituals',, 12 July 2008.

    July 19, 2008