Photo by @tbfrost An adult male gelada monkey yawns in the morning near cliffs overlooking the great Rift Valley in the central highlands of Ethiopia. As you can see, The adult male geladas have very impressive teeth, which they also display from time to time as a threat to display to other geladas. Shot #onassignment with @jtkerby for national geographic magazine. To keep following along on our adventure here in Ethiopia, and especially to see behind the scenes photos of what it's like to be on assignment for nat geo follow me @tbfrost by natgeo

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