单词	redback
释义	redback /ˈrɛdbak / (also redback spider) noun A highly venomous Australasian spider which is black with a bright red stripe down the back, closely related to the American black widow. Latrodectus hasselti, family Theridiidae. From Sydney we have had the Sydney huntsman spider, the Australian redback spider, and the North American southern ring-necked snake.... Such a strategy has been identified in a range of animals, including the redback spider, house sparrow, and moth. Data from two observational field studies and one release experiment suggest that in the absence of cannibalism, male redbacks would expect fewer than one mating opportunity in a lifetime.
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