ナショナルジオグラフィックのインスタグラム(natgeo) - 11月4日 04時33分

Photo by @beverlyjoubert | It looks like a snarl, but it is in fact a response to pheromones known as the ""flehmen"" response. This is seen in a number of mammals and most cats (including house cats), and allows them to check the reproductive or territorial status of others. Both males and females will bare their teeth like this when they come across a scent that gives them a chemical signal. This dominant male is testing the pheromones in the urine of a female who is coming into estrus and, after sensing her readiness, will track her very closely.
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