How Farmers Accidentally Killed Off North America's Locusts

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Locusts are a huge agricultural pest...except in North America. What happened to the Rocky Mountain locusts that once swarmed this continent? Researchers think that the colonization of the North American West might have had something to do with their disappearance.

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Sources:
DOI: 10.1126/science.1165939 (Anstey et al. 2009) http://halachicadventures.com/wp-content/uploads/2009/09/locust-sawrming-serotonin.pdf
https://doi.org/10.1093/ee/19.5.1194 (Lockwood and Debrey 1990)
https://academic.oup.com/ee/article-abstract/19/5/1194/354423?redirectedFrom=fulltext
https://doi.org/10.1163/187498310X523874 (Lockwood 2010)
https://brill.com/view/journals/tar/3/2/article-p129_3.xml?language=en
doi:10.1016/S1055-7903(03)00209-4 (Chapco 2004)

Image Sources:
https://www.storyblocks.com/video/stock/fly-swarm-looped-v-4-rcqaivbcxjmwl6reu
https://www.istockphoto.com/photo/swarm-of-locust-gm637972720-114104831
https://www.istockphoto.com/photo/desert-locust-gm121142231-16893249
https://commons.wikimedia.org/wiki/File:Individual-Pause-and-Go-Motion-Is-Instrumental-to-the-Formation-and-Maintenance-of-Swarms-of-pone.0101636.s020.ogv
https://commons.wikimedia.org/wiki/File:Rocky_Mountain_locust.jpg
https://www.istockphoto.com/vector/usa-map-gm1032423460-276529240
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https://www.istockphoto.com/photo/stream-flows-off-mountain-side-gm1223014527-359094649
https://www.istockphoto.com/photo/tidal-river-gm1015490880-273283898
https://www.istockphoto.com/photo/beaver-at-horseshoe-lake-gm1203224938-345741493
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https://www.istockphoto.com/vector/locust-large-herbivorous-insects-attack-on-crops-icon-gm1207904579-348943398
https://www.istockphoto.com/photo/two-striped-grasshopper-resting-on-sand-gm1033208618-276702715
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