User blog comment:Lord Loss/Monster Appreciation Day: Khezu/@comment-15258026-20140504032053/@comment-4009941-20140504054914

Their tail is somewhat like Giginox in looking like a mouth when its opened

http://monsterhunter.wikia.com/wiki/File:HC_Red_%26_White_Khezu_P4.jpg Observe the white ones tail lifted into the air closely.