The river birches at the Morris Arboretum in Chestnut Hill, PA, were loaded hundreds or perhaps thousands of spotted lanternfly egg masses, all of them amazingly camouflaged. Can you find them on the trunk below? Click on the photograph to view a larger version.
In addition to trees, spotted lanternflies can oviposit on a variety of artificial surfaces such as shipping containers, cars, trains, and garden tools. Their fondness for hard, smooth surfaces means that humans unwittingly transport them across state lines.
Here are the locations of the egg masses.