Blue-tailed Skink
Overview
 
In North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

, "blue-tailed skink" usually means juveniles of
Plestiodon
Plestiodon
Plestiodon is the name for a genus of lizards formerly referred to as Eumeces, except those now placed in Mesoscincus.The genus Plestiodon are skinks...

, in particular Plestiodon fasciatus.

The Blue-tailed Skink (Cryptoblepharus egeriae) is a skink
Skink
Skinks are lizards belonging to the family Scincidae. Together with several other lizard families, including Lacertidae , they comprise the superfamily or infraorder Scincomorpha...

 native to Australia's Christmas Island
Christmas Island
The Territory of Christmas Island is a territory of Australia in the Indian Ocean. It is located northwest of the Western Australian city of Perth, south of the Indonesian capital, Jakarta, and ENE of the Cocos Islands....

 and is not closely related to the Plestiodon
Plestiodon
Plestiodon is the name for a genus of lizards formerly referred to as Eumeces, except those now placed in Mesoscincus.The genus Plestiodon are skinks...

skinks of North America, whose juveniles are known for their blue tails. It is relatively small with a black body with yellow stripes going to a bright blue tail.
Blue-tailed skinks are usually about 4 to 8 centimeters long.
 
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