Understanding Rainier And Fern’s ‘Stinky Faces’

  • Understanding the Flehmen Response in Mountain Lions and Other Mammals
  • The Role of Jacobson’s Organ in Olfactory Communication
  • Enrichment Practices for Captive Wildlife in Zoological Settings
  • ZooAmerica’s Approach to Environmental Enrichment for Mountain Lions
  • The Importance of Behavioral Observations in Wildlife Conservation Efforts

The Flehmen response, often mistaken for a “stinky face” or a smile by casual observers is a distinctive behavioral trait observed in many ungulates, felids, and other mammals, including the majestic mountain lions at ZooAmerica. When Rainier or Fern at the zoo exhibit this behavior, they engage in a complex process involving olfactory communication and sensory analysis.

Essentially, the Flehmen response facilitates the transfer of pheromones and other scents into the vomeronasal organ, also known as Jacobson’s. This auxiliary olfactory sense organ is found in many animals. This organ plays a crucial role in scent detection’s behavioral and physiological effects. During the Flehmen response, the animal curls back its upper lip, inhales, and often pauses to hold the scent in the organ, which can be analyzed more intensely.

In zoo environments like ZooAmerica, understanding and catering to natural behaviors such as the Flehmen response is vital. The zoo’s keepers are well-versed in the nuances of animal behavior and use this knowledge to enhance the lives of the animals through enrichment programs. Scents such as spices, perfumes, and urine from other animals stimulate and engage the mountain lions, prompting them to exhibit the Flehmen response as they investigate these intriguing odors.

Enrichment is a critical component in the management of captive animal populations. It provides mental stimulation and mimics animals’ challenges in the wild. For species like mountain lions, which possess advanced olfactory capabilities, scent-based enrichment helps fulfill innate needs to explore and respond to their environment. The keepers’ dedication to employing a variety of olfactory stimuli not only supports the physical and mental health of the mountain lions but also offers visitors an opportunity to witness these fascinating creatures displaying natural behaviors.

Few things can match the spectacular sight of a mountain lion engaging in the Flehmen response, which is why ZooAmerica encourages visitors to observe this behavior. The typical reaction might mirror human expressions of disgust or contentment. Still, in reality, it is a sophisticated mechanism that allows the mountain lion to determine the presence and reproductive status of conspecifics and detect potential prey or threats in their environment.

ZooAmerica’s commitment to the welfare of their mountain lions aligns with broader wildlife conservation efforts, which emphasize the importance of naturalistic behaviors for understanding species-specific needs and promoting overall animal health. By offering exceptional care and a dynamic living space, the zoo supports valuable research and conservation work that extends well beyond the enclosures of its resident wildlife.

The Flehmen response and other such behaviors provide researchers and conservationists with insights into mountain lions’ secretive lives and other animals’ lives. Observing and interpreting these behaviors can enhance habitat management, breeding programs, and wildlife conservation strategies. This proactive approach in captive animal management reflects a deep respect for the natural world and a steadfast commitment to preserving it for future generations.

ZooAmerica’s approach combines the nuances of animal behavior with active stewardship, highlighting the interconnectedness of zoo management, wildlife conservation, and educational outreach. The success of their programs is visible in the healthy behaviors of Rainier, Fern, and other animals at the facility, demonstrating the profound impact that well-informed, species-specific care can have on the vitality of wildlife in human care. As visitors witness the Flehmen response in action, they are reminded of the complexity of our natural world and the ongoing efforts to ensure its preservation.

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Source Description
Have you ever seen Rainier or Fern make a “stinky face,” or look like they are smiling? This is known as the flehmen response. This behavioral response helps the mountain lions process interesting smells, including scents left behind from another mountain lion or animal. By opening up their mouth, air will pass through the Jacobson’s organ allowing them to further evaluate the scent.

At ZooAmerica, keepers enjoy providing different scents, such as spices, perfumes or even urine from other animals, as a form of enrichment. Fern will often use the flehmen response to investigate these different odors.

Check our Instagram story for a video of Fern’s flehmen response!

📷: Alicia H., Zoo Supervisor

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