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Fascinating Facts About Crocs

Test your knowledge about crocs, then come see Crocs: Ancient Predators in a Modern World

PHILADELPHIA, December 27, 2017

Crocodiles, alligators, caimans—these creatures have flourished for 20 million years. How do they do it? Crocs: Ancient Predators in a Modern World, an exhibit opening Saturday, Feb. 3 at the Academy of Natural Sciences of Drexel University, explores this fascinating group of animals.


Here are some fascinating facts about crocs that many people don’t know. Test your knowledge.


  1. ___________ was an extinct croc that may have eaten big dinosaurs.

    A: Deinosuchus

  2. TRUE or FALSE? Crocodilians are more closely related to birds than they are to lizards.

    A: True

  3. TRUE or FALSE? Croc fossils have been found on every continent except Antarctica.

    A: False, every continent including Antarctica

  4. Sarcosuchus imperator had more than __________ teeth lining its massive jaws.

                A: 100

  5. In cold weather American alligators go through a dormant state called ___________.

    A: Brumation

  6. ___________ are bony disks embedded in the skin of crocodilians.

    A: Osteoderms

  7. TRUE or FALSE? A croc may go through as many as 15,000 teeth in its lifetime.

    A: False, more like 3,000-4,000

  8. Crocodilians communicate with sight, sound, ___________, and ___________.

    A: Chemical cues and touch

  9. __________ species of crocs are now considered critically endangered.

    A: 7

  10. TRUE or FALSE? People living in Australia are more likely to drown than to be killed by a croc.

    A: True

  11. What was the first animal to be removed from the U.S. endangered species list?

A: American alligator