Question 1

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 2

True or false: Red crabs are found only on Christmas Island and nowhere else on Earth.

Accepted Answer

True. This species (Gecarcoidea natalis) is endemic to Christmas Island and the Cocos (Keeling) Islands, making it a unique island specialist.

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 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 5

True or false: These crabs can climb trees and eat fallen leaves, fruits, and flowers in the rainforest.

Accepted Answer

True. Red crabs are omnivorous scavengers that climb trees for food, and their diet includes leaf litter, seedlings, and carrion, helping recycle nutrients.

Question 6

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 7

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

Accepted Answer

False. Their lifespan is typically 10–12 years in the wild. The 20-year figure is exaggerated; they are long-lived but not record-holders.

Question 8

True or false: The red crab's bright color comes from a pigment that protects them from UV rays on exposed roads.

Accepted Answer

False. Their red color is primarily for camouflage against predators in the forest floor, not UV protection. It's a common myth tied to their migration visibility.

Christmas Island Red Crab Trivia Questions