Crocodilian Identification

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Date:

Instructions: Snap up your knowledge of crocodiles, alligators, caimans, and gharials

1.
What is the main visible difference between an alligator and a crocodile when their mouth is closed?
A
There is no visible difference
B
Alligators are darker in color
C
Alligators are larger
D
Crocodiles have a V-shaped snout and visible lower teeth
2.
Which crocodilian is the largest reptile in the world, growing over 20 feet long?
A
Black Caiman
B
Saltwater Crocodile
C
American Alligator
D
Nile Crocodile
3.
Which crocodilian from India has an extremely narrow, elongated snout specialized for catching fish?
A
Mugger Crocodile
B
Slender-snouted Crocodile
C
Gharial
D
False Gharial
4.
In which U.S. state can you find both American alligators and American crocodiles living in the wild?
A
Florida
B
Louisiana
C
Georgia
D
Texas
5.
Which African crocodile is one of the most dangerous to humans, responsible for hundreds of attacks per year?
A
Slender-snouted Crocodile
B
Dwarf Crocodile
C
West African Crocodile
D
Nile Crocodile
6.
Which South American crocodilian is the largest predator on the continent, rivaling some crocodiles in size?
A
Black Caiman
B
Spectacled Caiman
C
Yacare Caiman
D
Dwarf Caiman
7.
How do crocodilians regulate their body temperature?
A
Generating heat through muscle contractions
B
Internal metabolism like mammals
C
They maintain a constant temperature
D
Basking in the sun and moving to shade
8.
Which is the smallest crocodilian species in the world, reaching only about 5 feet in length?
A
Dwarf Crocodile
B
Spectacled Caiman
C
Cuvier's Dwarf Caiman
D
Chinese Alligator
9.
Which critically endangered crocodilian from China has fewer than 150 individuals left in the wild?
A
Philippine Crocodile
B
Siamese Crocodile
C
Gharial
D
Chinese Alligator
10.
What determines the sex of crocodilian hatchlings?
A
Temperature during incubation
B
Position in the nest
C
Egg size
D
Genetics
11.
How many species of crocodilians (crocodiles, alligators, caimans, and gharials) exist today?
A
About 60
B
About 24
C
About 40
D
About 10
12.
Which crocodilian is known for its 'death roll' technique used to tear apart large prey?
A
Only saltwater crocodiles
B
All crocodilians use this technique
C
Only alligators
D
Only crocodiles
13.
What do female crocodilians famously do with their newly hatched babies?
A
Abandon them immediately
B
Feed them regurgitated food
C
Carry them gently to water in their mouths
D
Teach them to swim
14.
Which crocodilian can tolerate saltwater and has been found swimming far out at sea, sometimes crossing ocean channels?
A
Nile Crocodile
B
American Crocodile
C
Saltwater Crocodile
D
Mugger Crocodile
15.
How long have crocodilians existed on Earth, making them one of the oldest surviving animal groups?
A
About 100 million years
B
About 50 million years
C
About 10 million years
D
About 200 million years

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