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The redback spider (Latrodectus hasselti), also known as the Australian black widow, [2] [3] [4] is a species of highly venomous spider believed to originate in Australia but now, Southeast Asia and New Zealand, it has also been found in packing crates in the United States with colonies elsewhere outside Australia. [5]
Sexual selection for male sacrifice in the Australian redback spider. Science. 1996. Maydianne C.B. Andrade. Risky mate search and male self-sacrifice in redback spiders. Behavioral Ecology. 2003. Damian O Elias, Michael M Kasumovic, David Punzalan, Maydianne CB Andrade, Andrew C Mason. Assessment during aggressive contests between male jumping ...
Phidippus johnsoni, the red-backed jumping spider or Johnson jumping spider, is one of the largest and most commonly encountered jumping spiders of western North America. It is not to be confused with the unrelated and highly venomous redback spider ( Latrodectus hasselti ).
However, bites from male redback spiders have been reported, suggesting male Latrodectus spiders can cause envenoming in humans. Bites by male spiders are much rarer than those by females, perhaps due to their smaller jaws rather than lacking venom of similar potency to females or being unable to administer an effective bite. [30]
A video camera observed what happened to free-flying male fireflies subsequently trapped by the webs in four different scenarios involving two different variables: whether a spider was in the web ...
The male widow spiders often exhibit various red or red and white markings on the dorsal surface (upper side) of the abdomen, ranging from a single stripe to bars or spots, and juveniles are often similar to the male pattern. Females of a few species are paler brown and some have no bright markings.
The spider measured 7.9 centimeters (3.1 inches) from foot to foot, surpassing the park’s previous record-holder from 2018, the male funnel-web named “Colossus".
Brown recluse. What they look like: The brown recluse is a brown spider with a distinct “violin-shaped marking” on the top of its head and down its back, Potzler says. Also, brown recluse ...