The spider war is here. Which species will prevail?
, he noticed that areas brown widows displaceding black widows, but they didn’t conquer regions populated with other related spider species. He and his advisor devised a study to look at what was driving this displacement. The mathematical modeling used in the study showed both species are much more likely to die from being eaten than from food scarcity.
While living with the red house spider, sub-adult brown widow females simply cohabitated with other females in 50 percent of pairings. The red house spiders killed and consumed the brown widows in 40 percent of the observed pairings. in 80 percent of pairings ,and they were killed in just 10 percent of the observed pairings.
“We didn’t expect to find such a dramatic and consistent difference in the personalities of the brown widow and the black widow,” said co-author and biologist Deby Cassill,. “Brown widows are boldly aggressive and will immediately investigate a neighbor and attack if there is no resistance from the neighbor. For two bold spiders, the initial attack is often resolved by both individuals going to separate corners and eventually being OK with having a nearby neighbor.
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