Second-instar nymphs of tuliptree scale, Toumeyella liriodendri, overwinter.

Several oval, brown nymphs of tuliptree scale on a twig near shoot buds. Credit: United States National Collection of Scale Insects Photographs, USDA Agricultural Research Service, Bugwood.org
Credit: United States National Collection of Scale Insects Photographs, USDA Agricultural Research Service, Bugwood.org