Species: giggi
Source: http://monsterhunter.wikia.com/wiki/Giggi
Giggi are Flying_Wyverns introduced in Monster Hunter 3.
Spawning from large, organic globules (Giggi Sacs) in dark caves, they exhibit unique behavior.
When the torch is drawn, they retreat in fear; however, when the torch is extinguished, they slowly follow hunters and latch onto them, constantly draining "blood", doing damage similar to the poison effect, and must be "shaken" off. If a Giggi sucks a significant amount of health off the victim, it will be able to do a poison spit.
This tag implicates flying_wyvern (learn more).