Latrodectus hesperus do not have many predators to look out for but the main one is the mud-dauber wasp, as seen below (Animal Diversity Web 2001).

black and yellow mud dauber, Sceliphron caementaria  (Hymenoptera: Sphecidae) - 5387745
Photo by Johnny N. Dell

Though not a common predator to Latrodectus hesperus nor a common prey for it, sometimes different organisms come up against L. hesperus that normally wouldn't. For example, here's a video of nature playing out between a female L. hesperus and a scorpion.

Another interesting example of nature defeating the odds is when a female Latrodectus hesperus comes up against a young eastern black-necked garter snake (Cates and W. 2012).

Eastern Black-necked Garter Snake (Thamnophis cyrtopsis ocellatus), juvenile; Bridget W., on Lake Belton, near Moffat, TXWestern Black Widow (Latrodectus hesperus), female; Bridget W., Lake Belton near Moffat, TX--2010
Photos by Bridget W.

In this example, the predator becomes the prey! Eastern black-necked garter snakes are known to eat frogs, insects and spiders among other things but it didn't know what it was getting in to. There were multiple bites on the garter snake and with the powerful venom of the black widow, it is no surprise the spider won. Here is the snake three days later, a great representation of how Latrodectus hesperus consumes its prey, by consuming the preys entrails while leaving the outside layer intact.

Western Black Widow Spider feeding on its prey, an Eastern Black-necked Garter Snake; Bridget W., on Lake Belton near Moffat, Texas
Photo by Bridget W.

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