A first-of-its-kind study used herbarium specimens to track insect herbivory across more than a century, and found that, across four species — shagbark hickory (Carya ovata), swamp white oak (Quercus bicolor), showy tick trefoil (Desmodium canadense) and wild lowbush blueberry (Vaccinium angustifolium) — specimens collected in the early 2000s were 23 percent more likely to be damaged by insect herbivores than those collected in the early 1900s.