Question 1

True or false: Christmas Island red crabs are found only on Christmas Island and the Cocos (Keeling) Islands.

Accepted Answer

True. Christmas Island red crabs (Gecarcoidea natalis) are endemic to these islands in the Indian Ocean. They naturally occur nowhere else, making the statement true.

Question 2

True or false: During migration, red crabs intentionally block roads to attract tourists and increase conservation funding.

Accepted Answer

False. Crabs don't have intentional goals—they migrate instinctively. Tourism is a byproduct, not a crab's purpose. This anthropomorphizes their behavior.

Question 3

True or false: Yellow crazy ants, an invasive species, pose a major threat to red crabs by spraying formic acid.

Accepted Answer

True. Introduced yellow crazy ants kill red crabs en masse with formic acid, disrupting their migration and ecosystem balance on Christmas Island.

Question 4

True or false: Christmas Island Red Crabs can climb trees and eat fallen leaves, fruits, and flowers in the rainforest.

Accepted Answer

True. Christmas Island red crabs are known to climb trees to feed on leaves, fruits, and flowers, and they also scavenge fallen plant matter, helping recycle nutrients in the rainforest ecosystem.

Question 5

True or false: Christmas Island red crabs migrate en masse to the ocean to breed, turning roads into red rivers.

Accepted Answer

True. Over 50 million red crabs migrate annually from forest to coast, creating spectacular traffic jams that locals manage with special bridges and tunnels.

Question 6

True or false: Christmas Island Red Crabs can live up to 20 years, making them one of the longest-lived land crabs.

Accepted Answer

False. Typically live 10–12 years in the wild, not 20. Other land crabs, like the coconut crab, can live 30+ years, so they aren't among the longest-lived.

Question 7

True or false: Female red crabs release their eggs into the ocean during a specific lunar phase for optimal tide timing.

Accepted Answer

True. Spawning is synchronized with the last quarter moon's high tide, ensuring eggs are swept out to sea to reduce predation and maximize survival.

Question 8

True or false: The Christmas Island Red Crab's bright color comes from a pigment that protects the Christmas Island Red Crab from UV rays on exposed roads.

Accepted Answer

False. The red color serves as camouflage among the red soil and leaf litter of the forest floor, not as UV protection on roads.

Christmas Island Red Crab Trivia Questions