Dangerous constricting snakes

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Possible Answers: Boas.

Last seen on: Daily Celebrity Crossword – 6/11/18 Movie Monday

Random information on the term “Boas”:

BoinaeCalabariinaeCandoiinae[a]ErycinaeSanziniinae

The Boidae (Common names: boas, boids) are a family of nonvenomous snakes primarily found in the Americas, although also existing in Africa, Madagascar, Europe, Asia, and some Pacific Islands. Relatively primitive snakes, adults are medium to large in size, with females usually larger than the males. Five subfamilies, comprising 12 genera and 49 species, are currently recognized.

Like the pythons, boas have elongated supratemporal bones. The quadrate bones are also elongated, but not as much, while both are capable of moving freely so when they swing sideways to their maximum extent, the distance between the hinges of the lower jaw is greatly increased.

Both families share a number of primitive characteristics. Nearly all have a relatively rigid lower jaw with a coronoid element, as well as a vestigial pelvic girdle with hind limbs that are partially visible as a pair of spurs, one on either side of the vent. In males, these anal spurs are larger and more conspicuous than in females. A long row of palatal teeth is present, and most species have a functional left lung that can be up to 75% as large as the right lung.

Boas on Wikipedia