IDENTIFICATION:
Scorpions are nocturnal, predatory animals that feed on a variety of insects, spiders, centipedes, and other scorpions. Large scorpions occasionally feed on vertebrates such as small lizards, snakes, and mice. Most scorpions live in warm, dry climates, and many of the species found in North America occur in Arizona, adjacent areas of California, and parts of New Mexico. Of the 70 or so species found in North America, only one, the bark scorpion, Centruroides exilicauda (formerly C. sculpturatus), is considered dangerous to people.
Scorpions are easily distinguished by their crablike appearance, pair of pincers, four pairs of legs, and long, segmented tail ending with an enlarged segment bearing a stinger. Although they have two eyes in the center of the head and usually two to five more along the margin on each side, they don't see well and depend on touch. When running, they hold their pincers outstretched, and the posterior end of the abdomen is usually curved upward. Scorpions that hide under stones and other objects during the day tend to carry their stinger to one side, whereas burrowing scorpions hold their stinger up over their backs.
The bark scorpion is found throughout Arizona, in the extreme southeastern portion of California near Arizona, and in southwestern New Mexico. In Mexico, the bark scorpion is found in Baja California Norte, Baja California Sur, and Sonora. Bark scorpions reach a length of 3 inches and have a very thin tail only 1/16 inch wide; the body is yellow without stripes or patterns. The bark scorpion is the only common climbing scorpion and does not normally burrow but usually lives above ground under tree bark and in palm trees and crevices of rocky cliffs. Because it can ascend slump block walls or stucco, this species is the scorpion most likely to enter dwellings. The bark scorpion is attracted to moisture around homes and in the house. It also may be found in stacked lumber or bricks, firewood piles, cellars, and attics. It needs only a crack of 1/16 inch to enter a home.
LIFE CYCLE:
Scorpions grow slowly. Depending on the species, they may take 1 to 6 years to reach maturity. On average scorpions may live 3 to 5 years, but some species can live as long as 10 to 15 years.
Scorpions have an interesting mating ritual. The male grasps the female's pincers with his and leads her in a courtship dance that may last for several hours. The exact nature of this courtship dance varies from one species to the next. In general, the male deposits a sperm packet and maneuvers the female over it. The sperm packet is drawn into the female's genital opening located near the front on the underside of her abdomen. The female stores the sperm packet, and the sperm is later used to fertilize her eggs. After mating, unless he is quick and able to escape, the male is often eaten by the female.
Once the female is impregnated, the gestation period may last several months to a year and a half depending on the species. A single female may produce 25 to 35 young. Scorpions are born live, and the young climb onto their mother's back. The young scorpions remain on their mother's back until their first molt. They assume an independent existence once they leave their mother's back. Scorpions molt five or six times until they become full-grown adults.
Scorpions generally hunt at night and use their stinger to paralyze prey. However, if the scorpion is strong enough to overpower its prey, instead of injecting its venom it will simply hold the prey and eat it alive. This conserves venom, which can take up to 2 weeks to regenerate, during which time the scorpion's main defense is inactive.
Outdoors during the day, scorpions hide in burrows or debris, under wood, stones, or tree bark, and under floors of buildings in crawl spaces. Indoors, scorpions may be found in cracks and crevices of woodwork, behind baseboards, in closets and attics, and inside walls. Scorpions gain entry into buildings through poorly sealed doors and windows, cracks in foundations, attic vents that aren't properly screened, and through plumbing and other openings.
Scorpions are nocturnal, predatory animals that feed on a variety of insects, spiders, centipedes, and other scorpions. Large scorpions occasionally feed on vertebrates such as small lizards, snakes, and mice. Most scorpions live in warm, dry climates, and many of the species found in North America occur in Arizona, adjacent areas of California, and parts of New Mexico. Of the 70 or so species found in North America, only one, the bark scorpion, Centruroides exilicauda (formerly C. sculpturatus), is considered dangerous to people.
Scorpions are easily distinguished by their crablike appearance, pair of pincers, four pairs of legs, and long, segmented tail ending with an enlarged segment bearing a stinger. Although they have two eyes in the center of the head and usually two to five more along the margin on each side, they don't see well and depend on touch. When running, they hold their pincers outstretched, and the posterior end of the abdomen is usually curved upward. Scorpions that hide under stones and other objects during the day tend to carry their stinger to one side, whereas burrowing scorpions hold their stinger up over their backs.
The bark scorpion is found throughout Arizona, in the extreme southeastern portion of California near Arizona, and in southwestern New Mexico. In Mexico, the bark scorpion is found in Baja California Norte, Baja California Sur, and Sonora. Bark scorpions reach a length of 3 inches and have a very thin tail only 1/16 inch wide; the body is yellow without stripes or patterns. The bark scorpion is the only common climbing scorpion and does not normally burrow but usually lives above ground under tree bark and in palm trees and crevices of rocky cliffs. Because it can ascend slump block walls or stucco, this species is the scorpion most likely to enter dwellings. The bark scorpion is attracted to moisture around homes and in the house. It also may be found in stacked lumber or bricks, firewood piles, cellars, and attics. It needs only a crack of 1/16 inch to enter a home.
LIFE CYCLE:
Scorpions grow slowly. Depending on the species, they may take 1 to 6 years to reach maturity. On average scorpions may live 3 to 5 years, but some species can live as long as 10 to 15 years.
Scorpions have an interesting mating ritual. The male grasps the female's pincers with his and leads her in a courtship dance that may last for several hours. The exact nature of this courtship dance varies from one species to the next. In general, the male deposits a sperm packet and maneuvers the female over it. The sperm packet is drawn into the female's genital opening located near the front on the underside of her abdomen. The female stores the sperm packet, and the sperm is later used to fertilize her eggs. After mating, unless he is quick and able to escape, the male is often eaten by the female.
Once the female is impregnated, the gestation period may last several months to a year and a half depending on the species. A single female may produce 25 to 35 young. Scorpions are born live, and the young climb onto their mother's back. The young scorpions remain on their mother's back until their first molt. They assume an independent existence once they leave their mother's back. Scorpions molt five or six times until they become full-grown adults.
Scorpions generally hunt at night and use their stinger to paralyze prey. However, if the scorpion is strong enough to overpower its prey, instead of injecting its venom it will simply hold the prey and eat it alive. This conserves venom, which can take up to 2 weeks to regenerate, during which time the scorpion's main defense is inactive.
Outdoors during the day, scorpions hide in burrows or debris, under wood, stones, or tree bark, and under floors of buildings in crawl spaces. Indoors, scorpions may be found in cracks and crevices of woodwork, behind baseboards, in closets and attics, and inside walls. Scorpions gain entry into buildings through poorly sealed doors and windows, cracks in foundations, attic vents that aren't properly screened, and through plumbing and other openings.
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