Types ATU0066B sham-dead animal betrays self
ATU022B false horns at horned animal dance
K0607.3 sham-dead animal betrays self
K1991 hare (jackal) makes horns of wax and poses as horned animal
Gerber has Kaffir story with jackal's horns of wax; Werner has "The Horned Animals and the Hyena" ... wolf often replaces hyena as dupe in American stories
Baer: the horned part "seems to have had its origin in Africa and followed the slave trade route to the West Indies and the South"
... for sham-dead story, see Chase011.