Is bear 32 Chunk sniffing the air for his rival 747? Katmai. 22 June 2024 (explore.org)

32 Chunk appeared at the top of Brooks Falls 25 minutes after bear 747 had visited. Chunk is seen here flehming or using the Flehmen response. This mouth open, lip-curling inhalation behavior is seen in many mammal species and is used to detect pheromones, or scents in the surroundings - such as fish or females in estrus, or rival male bears.
footage via BF camera:
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