A grimace similar to the flehmen response may also be seen in association with pain.

This latter olfactory system is used in the flehmen response.

Cats may be observed to sneer, though this is probably related to the Flehmen response.

Young elephants also have a flehmen response to stimulants.

The flehmen response is not limited to intraspecific communication.

Gaping is the equivalent of the Flehmen response in other animals, such as dogs, horses and big cats.

One such expression is the flehmen response.

The animal sniffing the scent mark will frequently display a flehmen response to assist in communication of the information.

The Flehmen response (lip curl) was observed during the majority of encounters between a male and a receptive female.

Stallions sometimes exhibit the Flehmen response by smelling the urine of a mare in heat.

He sniffs her urine to see if she is in oestrus, a process exhibiting the flehmen response.

Post-parturition - mares commonly show a peak in flehmen response during the first few hours after giving birth.

When she does, the male does the Flehmen response to determine if she is in estrus.

This organ is the sense organ involved in the flehmen response in mammals.

The flehmen response forces air through slits in the nasal cavity and into the vomeronasal organ.

Males assess the female's reproductive state with the flehmen response and the female will solicit mating by backing in.

In some mammals, the tongue is used to "lick" the air during the flehmen response to assist transfer of pheremones.

Goats have been tested for their flehmen response to urine from 20 different species, including several non-mammalian species.

Called the Flehmen response, it involves exposing the teeth by retracting the upper lip and sniffing.

The flehmen response often gives the appearance that the animal is "grimacing", "smirking" or "laughing".

The use of this organ is associated with the Flehmen response, in which the upper lip is curled upwards.

An animal may perform the flehmen response when investigating sites of particular interest, or perhaps (more generally) odors or tastes.

The response is perhaps most easily observed in domestic cats and horses; both exhibit a strong flehmen response to odors.

The chemical cue obtained by an animal exhibiting the flehmen response is the presence of a non-volatile organic compound.

The flehmen response also occurs, primarily in males in response to contact with female urine or genitals.