The specific name, erhardii, is in honor of a certain Dr. D. Erhard (first name unknown), a German naturalist, who was the author of Fauna der Cycladen (1858).

The belly and often throat are white, yellow, orange or red, and in the Aegean Islands also green, blue or grey.

[citation needed] Erhard's wall lizard lives in dry or rocky places with dense, low bushes.

The lizard populations in the Aegean archipelago inhabit open places, like plant-covered dunes, as well.

[citation needed] P. erhardii chooses backgrounds that match its colour to enhance camouflage against avian predators in its natural habitat.