Yawn

 Yawn

Created via T-Virus, Primary Infection Base Organism Snake Class Reptilia Purpose Experimental Appearance(s) Resident Evil Resident Evil: The Umbrella Chronicles The Yawn was originally a poisonous snake bred in captivity in the Arklay Laboratory for use in T-Virus experiments as a test subject for B.O.W. development. After the outbreak at the facility in May 1998, the snake escaped from containment and was subsequently infected with the virus.

History
In May 1998 while still in captivity before it could be utilized as a test subject, an accident occured in the Arklay Laboratory which caused the snake to become infected with the T-Virus accidentally after escaping its containment. As a result, it grew to gigantic proportions. An early victim of the virus outbreak, many of the surviving researchers of the facility were witnesses to the snake's hunting techniques and as a result they dubbed the serpent, " Yawn " , after its tendency to open its mouth wide before striking and devouring its prey whole, resembling a yawn. The Yawn hunted throughout the mansion, sliding through any holes in the walls and any crevices between them, and as such became an extremely effective hunter.

Attributes
Aside from the dramatic size increase, also increased the snake's ferocity and aggressiveness. As a result of the sudden growth of its body, its width is disproportionate with its length. The creature did not show any sign of enhanced intelligence, but became far more of a natural, faster hunter than before, actively hunting and stalking its prey throughout the mansion complex. However, it is incapable of any physical movement beyond that of a normal snake. The virus greatly strengthened the creature's already potent venom, which now requires an unusually powerful serum to counteract. If not treated, the snake's venom will spread and kill the victim within minutes. Its skin also appears to have undergone some changes, as it is highly resistant to fire, but weak to sulfuric acid.

It is assumed that the Yawn was originally a Western Cottonmouth due to its physical traits. The Western Cottonmouth belongs to the Pit Viper family of snakes and as such is extremely venomous. The snake resides in the mid-western states of America but chooses to stay close to water sources at most times. Despite having a highly potent bite, the Cottonmouth will only use this as a last resort. When threatened the snake will open its mouth wide revealing the so called "cottonmouth" where its name was derived. The snake's colourations and markings also match those typical of a Western Cottonmouth.