Hippopotamus yawning, threat or dominance display

Hippopotamus (Hippopotamus Amphibius)..Yawning Hippo..April 2009, fall..Tala Game Reserve, Kwazulu-Natal, South Africa.
Hippopotamus (Hippopotamus Amphibius)..Yawning Hippo..April 2009, fall..Tala Game Reserve, Kwazulu-Natal, South Africa.
Filename: Hippopotamus yawning, threat or dominance display-_MG_0667-20090428.jpg
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