Would you believe that this tiny antelope (common to East Africa) is only about 12 inches tall? It has a long tubular snout through which its blood is pumped to help cool its body (nasal panting). That snout can also be used as a whistle; the shrill noise it makes sounds like "dik-dik" hence its popular name.
I believe this species is Kirk's dik-dik (Madoqua kirkii). I captured this image in the Tanzanian Serengeti last year.
Special Gland
The Did-dik is a tiny antelope, maybe 12" at the shoulder. It is uniquely built for life in the African savannah. It has a nose that functions like a bellows, cooling the blood as it circulates. It has huge eyes and excellent vision to spot approaching predators. It even has a special gland just below its eye that secretes a sticky substance used to scent-mark territory.
I think this one is Kirk's Dik-dik (Madoqua kirkii). He found us in the central Serengeti (Tanzania).