Widow Spiders (Family Theridiidae)
Western Black Widow (Latrodectus hesperus)
Invertebrates Around Las Vegas, Wildlife Around Las Vegas
Theridiidae

General: Widow Spiders (Family Theridiidae) are medium-sized spiders that weave erratic webs, often near the ground or in a dark corner. Females are large, black, shiny, and have a red hour-glass shaped mark on the underside of the abdomen. Males are much smaller and tend to be plain brownish.

Round, white, egg sacks often can be seen in the web, also old egg sacks, sheds, and prey debris.

Like all spiders, Widow Spiders have fangs and venom, and these are quite harmful to humans. Highly venomous and dangerous to humans.

Theridiidae
Black Widow family in web
Theridiidae
Female Black Widow with red hour-glass marks
Theridiidae
Female Black Widow with red hour-glass marks
Theridiidae
Female Black Widow with red hour-glass marks
Theridiidae
Female Black Widow with egg sack
Theridiidae
Female Black Widow with egg sack
Theridiidae
Male and female
Theridiidae
female with prey items
Theridiidae
Female eating a tarantula
Theridiidae
Female eating a tarantula
Theridiidae
Male black widow -- compare to size of egg sack
Theridiidae
Male black widow
Theridiidae
Male black widow -- notice those fangs!
more to come ...

Note: All distances, elevations, and other facts are approximate.
copyright; Last updated 120819

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