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The adult female is easily recognised by her spherical black body with a prominent red stripe on the upper side of her abdomen and an hourglass-shaped red/orange streak on the underside. Females usually have a body length of about 10 millimetres (0.4 in), while the male is much smaller, being only 3–4 mm (0.12–0.16 in) long.
When a black widow spider bites, it typically causes a painful pinprick sensation. The site of the bite then swells slightly and forms a red rash. You might see two fang marks inside the bite area ...
Antennae are long and thin. The basic color of the body is black. They show a very prominent crown of thorns on thorax and red and black warning colors on the edge of the abdomen (laterotergites). On the hemelytra are present a few red markings. Legs are rather long, with red and black femurs and completely red tibiae.
Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. The female's body is 14–16 mm (1/2 in) in length and is black, often with an hourglass-shaped red mark on the lower abdomen. This "hourglass" mark can be red, yellow, and on rare occasions, white.
Latrodectus mactans, known as southern black widow or simply black widow, and the shoe-button spider, [citation needed] is a venomous species of spider in the genus Latrodectus. The females are well known for their distinctive black and red coloring and for the fact that they will occasionally eat their mates after reproduction.
Androctonus bicolor, the black fat-tailed scorpion, is a scorpion species of the family Buthidae. It is black in color and can grow up to 8 cm. [1] Black fat-tailed scorpions come from the family Buthidae, which is the largest of the scorpion family. [2] They can be identified by their hefty physique. [3]
The black and amber thorax and long legs are smooth and shiny, and the front pair of legs is noticeably larger than the others. The fully functional wings each have a single large tan, orange, or red spot at its center. When at rest, the wings are folded on top of each other along the insect's back, making the wing spots appear as one larger ...
Black flies are central to the transmission of the parasitic nematode Onchocerca volvulus which causes onchocerciasis, or "river blindness", which is endemic in parts of South America, Africa, and the Arabian Peninsula. It serves as the larval host for the nematode and acts as the vector by which the disease is spread. The parasite lives on ...
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