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Veterinary Manual
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Green iguanas, male and female
Green iguanas, male and female

Green iguanas, male (left) displaying a larger dewlap and jowls than the female (right).

Courtesy of Dr. Stephen Divers.

In these topics
Overview of Reptiles

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Merck & Co., Inc., Kenilworth, NJ, USA is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world.  The Merck Veterinary Manual was first published in 1955 as a service to the community.  The legacy of this great resource continues as the Merck Veterinary Manual in the US and Canada and the MSD Manual outside of North America.

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