The flehmen response, also called the flehmen position, flehmen reaction, flehmen grimace, flehming, or flehmening, is a behavior in which an animal curls back its upper lip exposing its front teeth, inhales with the nostrils usually closed, and then often holds this position for several seconds. It may be performed over a sight or substance of particular interest to the animal, or may be performed with the neck stretched and the head held high in the air.
Flehmen response in a horse
Flehmen response in a Sumatran tiger
Flehmen response in a tapir
Flehmen response in an elk
Felidae is the family of mammals in the order Carnivora colloquially referred to as cats. A member of this family is also called a felid. The term "cat" refers both to felids in general and specifically to the domestic cat.
Felidae
Extended claws on a house cat
Lionesses grooming each other
Megantereon model at Natural History Museum of Basel