spiney-tail images - Joel Sartore

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

A Mexican spiny-tail iguana (Ctenosaura pectinata), at the Chapultepec Zoo, Mexico City, Mexico.

National Geographic Photographer and Speaker