When were rocky mountain locusts were extinct?

Answer 1

They Were Extinct Around At 1902. They Were One Of The Hugest Pests In North America. They Have Been Known To Eat Up A Wheat Crop Field In Less Than 1 Hour. Most Wheat Were Gone Because Of The Locust. The Reason Of Extinction Is Because Of Irragation And A Tree That Is Used To Stop The Locusts. And Many People Have Destroyed There Habitats. Irragation Ruined There Life Cycle. And Of Course, Irragation Is Water, So They Are Dangerous To Insects Such As The Rocky Mountain Locust. Many Predators Especially Insect Eating Birds Ate Them. And Also Spiders Ate Them. Some Dead Locusts Are Found At Some Museums.