From: http://www.cryptozoology.fsbusiness.co.uk/topics/deathworm/index.html
The Mongolian Deathworm (also referred to as the "Allghoi
Khorkhoi" or "Intestine Worm") is supposedly a giant
redish coloured worm dangerous enough to kill a large desert animal
such as a camel or even a human.
Sightings of the Deathworm are very rare, so there is very little
information on this strange creature. Much of the mystery is due
to the hot climate and large open, but lowly populated area it is
known to live in - the Gobi Desert in Mongolia. Past expeditions
and investigations have proved very unsuccessful. The first known
sighting streches back to 1926 in the Southern part of the Gobi
Desert. The majority of the sightings have been made in the months
of June and July, fueling specuation that the Death Worm may actually
spend much of its life in hibernation.
Many Mongolian people believe the creature carries some kind of
poision or electrical charge which enables it to survive and attack
from great distances