🐒 Free-ranging drill alpha male in motion, where you get to see his colors, mane, size (probably around 25 kg), facial expressions, and general awesomeness.⁠ ⁠ And hear the deep, guttural roars typical of males when they want to show off their strength and size (make sure the sound is on). He is vocalizing because a large male from another troop, Goremus, is nearby; you can hear Goremus roaring in the background.⁠ ⁠ _____⁠ ⁠ 📹️ courtesy of: @mogenstrolle⁠ ⁠ ⁠ ⁠ #drill #mandrill #roaring #biology #science #nature