The Northern diamondback terrapin is a small species of turtle that lives in the brackish and coastal swamps of the Eastern and Southern United States of America. It is characterized by its distinctive shell pattern of interlocking ‘diamonds’ that tend to have concentric light and dark rings within them. However, pattern and coloration does vary within the species. The average shell length of males is 13cm, whereas the average shell length of the female is 17cm.

Latin Name
Malaclemys terrapin terrapin
Slug
diamondback-terrapin
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Animal Facts
Diamondback terrapins were considered a delicacy and almost hunted to extinction for their meat in the 19th Century.
The Diamondback terrapin is sexually dimorphic; the males are significantly smaller than the females.
The concentric rings within the plates of the Northern diamondback terrapin’s shell are growth rings that form as the terrapin gets larger.
Diamondback terrapins live in brackish water (areas where freshwater and seawater mix) but require visits to freshwater to avoid dehydration.
Diamondback terrapins have salt glands behind their ear which allow them to excrete excess salt that they accumulate from living in near-marine environments.
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