United States Fish and Wildlife Service list of threatened and endangered arthropods species may be treated as endangered or threatened if it resembles in appearance a species which has been listed and enforcement personnel would have difficulty distinguishing between the listed and the unlisted species; if the effect of this difficulty is an additional threat to the listed species; and if such treatment of the unlisted species would improve protection for the listed species. United States Fish and Wildlife Service list of threatened and endangered arthropods List of threatened and endangered arthropods, including insects, arachnids, and crustaceans under the United States Endangered Species Act as of October 2013. Key to Listing Status
Arthropods in film buildings than fire. They are responsible for many of the most dreaded diseases of man and his domestic animals... Some of them eat or attack everything man owns or produces-including man himself ." Thus, insects and other arthropods are dangerous to humans in both obvious and less obvious ways. Undoubtedly, arthropods are dangerous for their potential to carry disease. Somewhat less apparently, arthropods cause damage to buildings, crops, and animals. Since arthropods can be harmful in so many ways, using insects and other arthropods to frighten people in movies was a logical step. Aside from a natural fear or aversion