Crocodilians
Crocodilians, such as this Siamese crocodile (Crocodylus siamensis), have large flattened snouts and thick skin.
Source
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"OpenStax College, Reptiles. October 17, 2013."
http://cnx.org/content/m44689/latest/Figure_29_04_06.jpg
OpenStax CNX
CC BY 3.0.
