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Greater St. Croix Skink Moves Towards Endangered Species List

Greater St. Croix Skink (Spondylurus magnacruzae)
Greater St. Croix Skink (Spondylurus magnacruzae) Photo by: A.J. Meier

ST. PETERSBURG, Fla.—The U.S. Fish and Wildlife Service said today that seven species of Caribbean skinks may qualify for Endangered Species Act protection.

These rare lizards from the Virgin Islands and Puerto Rico are on the knife’s edge of extinction due to introduced predators and habitat destruction.

“The Endangered Species Act can save these skinks,” said Collette Adkins, a Center biologist and lawyer who works to protect reptiles and amphibians. “We can best deal with the habitat loss and invasive predators that threaten to wipe out these skinks by getting them protected under the Act. This announcement means they’re one step closer to getting the protections they need.”

The skinks included in today’s finding, along with dozens of others, were first identified by scientists in a 2012 study. The scientists initiated their study after finding unusually large genetic differences among populations of skinks on different islands in the Caribbean.

All of the newly identified endemic Caribbean skinks are near extinction (or already extinct) due to introduced predators like mongooses and cats, as well as large-scale habitat destruction for development and agriculture. The Center petitioned for these seven skinks and two others in a 2014 petition and was joined in its petition for the nine skinks by Dr. Renata Platenberg, an ecologist specializing in Caribbean reptiles.

“The Caribbean is home to extremely rare animals found nowhere else in the world, but too many are threatened with extinction,” said Dr. Blair Hedges of Temple University, the lead author of the 2012 study that first recognized the skinks. “I’m glad that the Fish and Wildlife Service is moving these skinks toward Endangered Species Act protection. We need to protect them before it’s too late.”

Although reptiles have been around for hundreds of millions of years and survived every major extinction period, now, due largely to human impacts, they’re dying off at up to 10,000 times the historic extinction rate.

About 20 percent of reptiles in the world are endangered or vulnerable to extinction. Within the Caribbean, scientists estimate that reptiles have levels of endangerment that are at or near the highest levels worldwide.

Today’s “90-day findings” are the first in a series of required decisions on the petition and simply required the Fish and Wildlife Service to determine whether the petition presented sufficient information to warrant further consideration, a process that requires few agency resources.

The next step is a full status review of the species by the Fish and Wildlife Service.

The FWS made the announcement In response to a 2014 petition from the Center for Biological Diversity,


Caribbean skinks, which can grow to be about 8 inches long, are unique among reptiles in having reproductive systems most like humans, including a placenta and live birth. They have cylindrical bodies, and most have ill-defined necks that, together with their sinuous movements and smooth, bronze-colored skin, make them look like stubby snakes.

Three of the species included in today’s finding are found within the territory of Puerto Rico: the Culebra skink (Culebra and the adjacent islet of Culebrita), Mona skink (Mona Island) and Puerto Rican skink (Puerto Rico and several of its satellite islands).

The remaining four are found in the Virgin Islands: the Greater St. Croix skink (St. Croix and its satellite Green Cay), Lesser St. Croix skink (St. Croix), Greater Virgin Islands skink (St. John and St. Thomas) and Virgin Islands bronze skink (St. Thomas and several of its islets, several British Virgin Islands).

Included in the petition but not today’s finding were the Monito skink (Monito Island) and Lesser Virgin Islands skink (St. Thomas and two adjacent islets, several British Virgin Islands).

To learn more about the Center’s Amphibian and Reptile Extinction Crisis campaign click on the following link:

Quebradilllas,  P. R.
Quebradilllas, P. R. (Puerto Rican skink lizard)
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The Author

John McCarthy

John McCarthy

John McCarthy is primarily known for his investigative reporting on the U.S. Virgin Islands. A series of reports beginning in the 1990's revealed that there was everything from coliform bacteria to Cryptosporidium in locally-bottled St. Croix drinking water, according to a then-unpublished University of the Virgin Islands sampling. Another report, following Hurricane Hugo in 1989, cited a Federal Emergency Management Agency (FEMA) confidential overview that said that over 40 percent of the U.S. Virgin Islands public lives below the poverty line. The Virgin Islands Free Press is the only Caribbean news source to regularly incorporate the findings of U.S. Freedom of Information Act requests. John's articles have appeared in the BVI Beacon, St. Croix Avis, San Juan Star and Virgin Islands Daily News. He is the former news director of WSVI-TV Channel 8 on St. Croix.

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