The bizarre nose of the Moose/Eurasian Elk (Alces alces). It isn’t known what all of this novel anatomy does, but it is probably involved with nostril closure.
Clifford, A. & Witmer, L. (2004) Case studies in novel narial anatomy: 2. The enigmatic nose of moose (Artiodactyla: Cervidae: Alces alces). J. Zool., Lond. 262, 339–360.