ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by @beverlyjoubert | It looks like a snarl but is in fact a response to pheromones. Known as the flehmen response, it's seen in a number of mammals and most cats (including house cats), allowing them to check the reproductive or territorial status of others. Both males and females will bare their teeth 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 oestrus and, after sensing her readiness, will be following her very closely. #BigCats #Flehmen# ThisIsMyTrophy #FelineCanine」3月26日 16時02分