Kissing Bugs- Triatomine
"Most triatomines aggregate in refuges during day and search for blood during night when the host is asleep and the air is cooler. Odors as well as heat guide these insects to the host. Carbon dioxide emanating from breath, as well as ammonia, short chain amines and carboxylic acids from skin, hair, and exocrine glands from vertebrate animals, are among the volatiles that attract triatomines. Vision also serves triatomines for orientation. During night, adults of diverse species fly to houses attracted by light.
Adults produce a pungent odour (isobutyric acid) when disturbed, and are also capable of producing a particular sound by rubbing the rostrum over a stridulatory sulcus under its head (stridulation)." [Source- WIKI]