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How to Identify and Classify Iguanas
Contributed by: Wallis
  • 1. What is the primary characteristic used to initially identify an iguana?
A) Presence of dewlap and dorsal spines
B) Color of scales
C) Shape of head
D) Length of tail
  • 2. What is a dewlap?
A) A flap of skin under the iguana's chin
B) A scale pattern on the back
C) A bony plate on the head
D) A type of claw
  • 3. What is the purpose of the dorsal spines on an iguana?
A) Thermoregulation
B) Water storage
C) Display and defense
D) Camouflage
  • 4. Which of these is a common iguana species?
A) Chameleon (Chamaeleonidae)
B) Green Iguana (Iguana iguana)
C) Bearded Dragon (Pogona vitticeps)
D) Komodo Dragon (Varanus komodoensis)
  • 5. Where are Green Iguanas primarily found?
A) Africa
B) Europe
C) Central and South America
D) Australia
  • 6. What is a key characteristic to differentiate between male and female Green Iguanas?
A) Color of scales is brighter in females
B) Males have shorter tails
C) Females have larger dorsal spines
D) Larger dewlap and femoral pores in males
  • 7. What are femoral pores used for?
A) Grasping branches
B) Breathing
C) Scent marking and communication
D) Hearing
  • 8. Which of the following best describes an iguana's diet?
A) Herbivorous (primarily plant-based)
B) Carnivorous (primarily meat-based)
C) Insectivorous (primarily insects)
D) Omnivorous (both plants and meat)
  • 9. What is a common defense mechanism used by iguanas?
A) Camouflaging into the background
B) Tail autotomy (shedding the tail)
C) Playing dead
D) Spitting venom
  • 10. What is the typical lifespan of a Green Iguana in captivity?
A) 20-30 years
B) 10-20 years
C) 5-10 years
D) 1-5 years
  • 11. What behavior do iguanas exhibit to regulate their body temperature?
A) Shedding their skin rapidly
B) Basking in the sun
C) Swimming in cold water
D) Burrowing underground
  • 12. What physical feature helps iguanas climb?
A) Webbed feet
B) Sharp claws on their toes
C) Suction cups on their feet
D) Prehensile tail
  • 13. Why is proper UVB lighting important for iguanas in captivity?
A) Skin coloration
B) Proper digestion
C) Vitamin D3 synthesis for calcium absorption
D) Temperature regulation
  • 14. What is a key difference between Green Iguanas and Rock Iguanas?
A) Rock Iguanas have a more robust build and spiny scales
B) Green Iguanas are larger than Rock Iguanas
C) Rock Iguanas are always green
D) Green Iguanas are only found on islands
  • 15. Where are Rock Iguanas primarily found?
A) Madagascar
B) Southeast Asia
C) Australia
D) Caribbean Islands
  • 16. Which conservation status do some species of Rock Iguanas have?
A) Near Threatened
B) Least Concern
C) Data Deficient
D) Endangered
  • 17. What is the scientific name for the Blue Iguana?
A) Brachylophus vitiensis
B) Cyclura lewisi
C) Iguana delicatissima
D) Amblyrhynchus cristatus
  • 18. What is the primary threat to wild iguana populations?
A) Climate change
B) Habitat loss and invasive species
C) Natural disasters
D) Lack of food sources
  • 19. What type of eggs do iguanas lay?
A) Soft-shelled eggs
B) Hard-shelled eggs
C) Gelatinous eggs
D) Leathery-shelled eggs
  • 20. What is the typical clutch size for a Green Iguana?
A) 1-5 eggs
B) 20-70 eggs
C) 5-10 eggs
D) 10-20 eggs
  • 21. What environmental factor influences the sex of baby iguanas?
A) Humidity
B) Food availability
C) Temperature
D) Light exposure
  • 22. What does it mean if an iguana is displaying its dewlap?
A) Regulating body temperature
B) Displaying dominance or attracting a mate
C) Signaling for food
D) Indicating fear
  • 23. What is the primary scale color of the marine iguana?
A) Brown
B) Red
C) Green
D) Black
  • 24. Where are Marine Iguanas found?
A) The Bahamas
B) Galapagos Islands
C) Hawaii
D) Fiji
  • 25. What adaptation allows Marine Iguanas to forage in the ocean?
A) Webbed feet
B) Gills
C) Ability to hold their breath for extended periods
D) Streamlined body shape
  • 26. What is the function of the salt glands in Marine Iguanas?
A) To produce venom
B) To excrete excess salt from seawater
C) To aid in digestion
D) To attract mates
  • 27. What is a characteristic feature of Fijian crested iguanas?
A) Fully aquatic lifestyle
B) Lack of a dewlap
C) Prominent crest of spines along their back
D) Bright blue coloration
  • 28. What type of habitat do Fijian crested iguanas inhabit?
A) Rainforests
B) Deserts
C) Dry forests
D) Mangrove swamps
  • 29. What is a defining characteristic of desert iguanas?
A) Heat tolerance
B) Excellent swimming ability
C) Cold tolerance
D) Nocturnal behavior
  • 30. What type of vegetation do desert iguanas often consume?
A) Orchids
B) Creosote bush
C) Moss
D) Seaweed
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