TedEd: Scared of Snakes?

How many viper species are there in the world?

• ~ 18

• ~ 68

• ~ 368

• ~ 680

What does viviparity mean?

• Egg laying

• Brightly colored

• Eggs develop inside the females' bodies

• Gives birth to live young

What do you find inside the rattle of a rattlesnake?

• Grains of sand

• Balls of keratin

• Balls of hair

• Old, dead skin cells

What unique adaptation belongs to the spider tail viper?

• The tail mimics a spider to attract prey.
• It uses venom to paralyze its prey instantly.
• It can change its size to blend in with its surroundings.
• It has a bright coloration to scare off predators.

What special sense do pit vipers have?

• Magnetic field detection
• Heat-sensing pits
• Echolocation
• Color vision

What is the longest viper in the world?

• African Gaboon Viper

• South American Bushmaster

• Iranian spider-tailed viper

• Eastern diamondback rattlesnake

Who has the largest fangs of all snakes (not just vipers)?

• African Gaboon Viper

• South American Bushmaster

• Iranian spider-tailed viper

• Eastern diamonback rattlesnake

Roughly how many snake species are there in the world?

• 1650

• 3879

• 5090

• 15687