No, you’re not imagining things!
A unique two-headed baby turtle was discovered last month at a protected nesting spot in Cape Cod, Massachusetts, and it’s surprisingly managing to survive.
This tiny diamondback terrapin hatchling, weighing about as much as a nickel, exhibits bicephaly, a rare developmental anomaly, as reported by the Cape Wildlife Center on their Facebook page.
The little turtle was taken to the wildlife center by the Mass Audubon Wellfleet Bay Wildlife Sanctuary for monitoring and care.
Bicephaly occurs when an animal is born with two functional heads on a single body, typically due to the incomplete division of an embryo during the formation of identical twins, according to various sources.
The Cape Wildlife Center mentioned that they have seen only two other instances of bicephaly in the past five years, making this double-headed baby turtle particularly exceptional.
“Although we’ve encountered this rare condition before, each case allows us to learn more about the anatomy and physiology of these intriguing animals,” the center noted.
“For now, our team is observing this little one’s (or should I say two’s?) appetite, growth, and behavior with great care.”
The finding of the two-headed turtle is an unusual demonstration of bicephaly, as pointed out by Zak Mertz, CEO of New England Wildlife Centers, which includes the Cape Wildlife Center.
“It’s fascinating and certainly deserves further investigation,” Mertz stated. “We’re eager to care for these two and gather information that could inform future research.”
Mertz explained that research suggests the rare condition may arise from both genetic and epigenetic influences.
“It could be related to the turtles’ long lifespans, their tendency to return to the same nesting sites, and a limited gene pool because of their conservation status,” he said.
Additionally, environmental factors like incubation temperature and humidity, the characteristics of nesting sites, or even the parents’ surroundings could play a role in this condition, he noted.
Although it’s unusual to have two heads, it’s not unheard of — there have been recent cases of bicephaly in other animals, such as a two-headed porpoise discovered off the Netherlands and a double-headed dolphin found along the Turkish coast.
Research from 2021 pointed out that double-headed and partially duplicated sea turtles often have significant abnormalities in their craniofacial structure and spine.
Typically, two-headed turtles are smaller than other hatchlings and face serious survival challenges due to their unusual anatomy.
Because having two heads poses a direct threat to the turtle’s survival, researchers believe monitoring these rare cases can provide important insights into the health of the species as a whole and their habitats.
Diamondback terrapins inhabit brackish marshlands along the US Atlantic and Gulf coasts and are recognized as threatened under the Massachusetts Endangered Species Act.
