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The Lyre's Mystery

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Description

Trimorphodon biscutatus - Western Lyre Snake
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Mildly Venomous

One of the larger rear-fanged snakes, but considered harmless to humans, but handle with caution, as some people have had unpleasant reactions to this snake's bite.

Size
Trimorphodon biscutatus have been recorded from 18 - 47 3/4 inches in length (46 - 121 cm). Most snakes encountered are 24 - 36 inches long (61 - 91 cm).

Appearance
A slender snake with a broad head well-differentiated from the slim neck. Coloring closely matches a snake's rocky habitat, from gray to light brown. There are usually about 28 large dorsal blotches with light edges and a pale crossbar in the center, and smaller irregular blotches on the lower sides. A lyre-shaped marking is present on top of the head. The pupils are vertical, like those of a cat. The underside is off-white or yellowish with dark spots. The anal plate is usually divided.

Behavior
Nocturnal, active in very dry conditions as well as during rains. Terrestrial, and good climbers. This snake often searches rock crevices for prey. It can be found during the day inside crevices in large rock outcrops, as well as crossing desert roads at night.

Diet
Primarily lizards, but also known to eat small mammals, nestling birds, and snakes.

Reproduction
Not well known. Lyre snakes apparently originated in the tropics, where breeding is year round, and the northern races may have retained this capability.

Range
In California, found only in the southeast along the Colorado River from approximately the Riverside/Imperial County line, north into San Bernardino County and the Nevada border. Ranges north into southern Nevada and extreme southwest Utah, through Arizona and extreme southwest New Mexico, south into Sonora and Sinaloa, Mexico.

Habitat
Associated primarily with rocky desert locations, but found in rockless areas, also.

Taxonomic Notes
Some researchers classify this snake as Trimorphodon biscutatus - Western Lyre Snake, with no subspecies recognized

Credit: CalifornisHerps.com
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Comments14
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Armenius's avatar
he's beautiful!
I know very little about reptiles outside of Oz, so thanks for the long description!