Composition Topic on Hissing Sounds

Research for composition:
Defination of Hiss:
http://en.wikipedia.org/wiki/Hiss

Besides snake, what animals hiss too?
Read about Hissing Cockroach.
http://en.wikipedia.org/wiki/Hiss

Hear samples of hissing sounds.
http://www.soundsnap.com/tags/hissing

For this composition, writing about sighting of a snake and then bitten by a snake is common.
Here is some information on snake bite:
http://en.wikipedia.org/wiki/Snakebite
(Information and photos of victim's bitten leg)

http://www.nlm.nih.gov/medlineplus/ency/article/000031.htm
(medical symptoms and first aid after bitten by a snake)

http://www.youtube.com/watch?v=EpcDZbXslfw&hl=en-GB&gl=SG
(real life scenario of lady bitten by a snake)

http://www.youtube.com/watch?v=4WvnjCkLbvY
(Snake venom was extracted and added to blood; see what happens.)

http://www.youtube.com/watch?v=_5dtpMj9Ehs
(Cobra vs Lion: in the wild)

http://firstaid.webmd.com/snakebite-treatment
(Snake bite treatment)

http://www.instructables.com/id/Snake-Care-non-venomous/step9/SNAKE-BITES-non-venomous/
(Bitten by non-venomous snake)

http://video.nationalgeographic.com/video/kids/animals-pets-kids/reptiles-kids/adder-peringueys-kids/
(Side winding snake)

http://www.sciencekids.co.nz/sciencefacts/animals/snake.html
(Facts on snakes)