tupping_0037

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Curling the upper lip in this flehmen response allows the rams to detect pheromones that signal a ewe's receptiveness.

Curling the upper lip in this flehmen response allows the rams to detect pheromones that signal a ewe’s receptiveness.

tupping_0037

tupping_0036 tupping_0037 tupping_0040 tupping_0055 tupping_0057 tupping_0033 tupping_0031 tupping_0037b tupping_0051
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