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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 cerastes [cerastes] – Klauber , 1944 [ 2 ] Crotalus cerastes , known as the sidewinder , horned rattlesnake or sidewinder rattlesnake , [ 3 ] is a pit viper species belonging to the genus Crotalus (the rattlesnakes), and is found in the desert regions of the Southwestern United States and northwestern Mexico.
Crotalus morulus, or the Tamaulipan rock rattlesnake, is a species of rattlesnake from Mexico, closely related to and previously considered a subspecies of Crotalus lepidus. [ 2 ] [ 3 ] The name morulus comes from the Latin word morus for mulberry in reference to their mottled patterns.
Like other rattlesnakes, its tail has a rattle, which is composed of keratin. Each time the snake sheds its skin, a new segment is added to the rattle. However, the rattle is fragile and may break off, and the frequency of shedding can vary. So, the snake's age cannot be determined by the number of segments or length of the rattle.
As with other rattlesnake species, prairie rattlesnakes will rapidly vibrate their tails, which produces a unique rasping sound to warn intruders. [12] Prairie rattlesnakes prefer a straight migration path while migrating even in human-dominated environments because it leads to a higher chance of survival and better body condition throughout ...
Rattlesnake skin has a set of overlapping scales that cover the entire body, providing protection from a variety of threats, including dehydration and physical trauma. [63] The typical rattlesnake, genus Crotalus, has the top of its head covered with small scales, except, with a few species, a few crowded plates directly over the snout. [64]