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Together with the Great Plains skink it is the largest of the "Plestiodon skinks", growing from a total length of 15 cm (5.9 in) to nearly 33 cm (13 in). A male broad-headed skink, illustration from Holbrook's North American Herpetology, 1842. The broad-headed skink gets its name from the wide jaws, giving the head a triangular appearance.
The coal skink mates in spring or early summer, laying a clutch of 8 or 9 eggs. Their eggs are typically around 10–11 mm in length. [5] Courting for this species usually involves the male's initial investigation and recognition of a potential female through pheromonal cues. [6]
The broad-headed skink, P. laticeps, is similar, and may be difficult to distinguish from P. fasciatus. The former species usually lacks the two enlarged postlabial scales characteristic of P. fasciatus. [7] [8] Adult male broad-headed skinks, with their large size and swollen red head, are readily distinguished from P. fasciatus. [9]
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The conspicuous coloring of species of Plestiodon is a survival trait: it attracts a predator's attention to the tail of the animal, which will break off when grabbed. A skink thus often manages to escape and hide under some rock, log, or fallen leaves while the predator still contemplates the wildly thrashing severed tail.
This is not true for all skinks, however, as some species such as the red-eyed crocodile skink have a head that is very distinguished from the body. These lizards also have legs that are relatively small proportional to their body size. Skinks' skulls are covered by substantial bony scales, usually matching up in shape and size, while ...
It has been suggested that the ideal human figure has its navel at the golden ratio (, about 1.618), dividing the body in the ratio of 0.618 to 0.382 (soles of feet to navel:navel to top of head) (1 ⁄ is -1, about 0.618) and Leonardo da Vinci's Vitruvian Man is cited as evidence. [23]
Other large members in the genus Plestiodon are a broad-headed skink (Plestiodon laticeps) and a Great Plains skink (Plestiodon obsoletus) with a maximum length of 32.4 cm (12.8 in) [163] and 34.9 cm (13.7 in) [164] and a SVL 14.3 cm (5.6 in) [163] and 14 cm (5.5 in) [165] respectively. The genus Chalcides includes many legless or almost ...