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A crotalus (Spanish: matraca), [1] [2] also known as a crotalum or clapper, is a wooden liturgical rattle or clapper that replaces altar bells during the celebration of the Tridentine Paschal Triduum at the end of Lent in the Catholic Church.
Their sound is rather like a small tuned bell, only with a much brighter sound and a much longer resonance. Similar to tuned finger cymbals, crotales are thicker and larger; they also have slight grooves in them. The name comes from the Greek crotalon, for a castanet or rattle.
Crotalus tlaloci can be distinguished from similar species of snake such as Crotalus triseriatus by specific scale counts, a proportionately smaller rattle, and a proportionally longer tail. It can also be told apart by a dark narrowing marking near its eye.
crotalus cliquettes Clappers from the Carolingian Empire appear to have been disks or possibly chimes attached to sticks. Other versions were blocks of wood held in the palms. The palm-held blocks could make clicking and rattle noises like castanets.
Sistrurus species differ from the larger rattlesnakes of the genus Crotalus in a number of ways. They are smaller in size, but also their scalation is different: Sistrurus species have nine large head plates (same as Agkistrodon), whereas in Crotalus (and almost all other viperids), the head is mostly covered with a large number of smaller scales.
The generic name Crotalus is derived from the Greek word κρόταλον krótalοn, which means "rattle" or "castanet", and refers to the rattle on the end of the tail, which makes this group (genera Crotalus and Sistrurus) so distinctive. [3] As of July 2023, 44 [4] to 53 [5] species are recognized as valid.
A camera mounted on a drone falls in a pit of snakes while filming
Crotalus willardi meridionalis, the southern ridge-nosed rattlesnake, is a subspecies of ridge-nosed rattlesnake native to Durango and Zacatecas, Mexico. [ 1 ] [ 2 ] As with all rattlesnakes , it is venomous .