Recent reports of a dramatic decline in the abundance of insects recommend serious consequences for global ecosystems and human society. However, most of the evidence comes from Europe, leaving uncertainty about trends in insect populations around the world. We use more than 5,300 time series of insects and other arthropods, collected for four to 36 years at tracking sites representing another 68 controlled and herbal areas, to look for evidence of decreases in the United States. Some taxa and sites have shown minimal abundance and diversity, while others have increased or remained unchanged, resulting in trends of net abundance and sometimes indistinguishable biodiversity of zero. This lack of overall increase or decrease was constant in all arthropod feeding equipment and was similar for highly disturbed sites compared to herbal sites. The obvious strength of American arthropod populations is reassuring. However, this result does not decrease the need for continuous monitoring and may mask more sophisticated adjustments to the composition of species that, however, endanger ecosystem facilities provided by insects. By analyzing abundance time series of more than 5000 insect populations and other arthropods from 68 sites within the U.S. network of long-term ecological studies, the authors locate a strong variation, but without a general trend of abundance and diversity between sites and taxa.