Milbert's tortoiseshell (Nymphalis milberti) is a small butterfly with a squared-off fore-wing. The wingspan is 1.6 - 2.5 inches (4.2 - 6.3 cm). The upperside is black with wide orange submarginal bands; this orange slightly fades to yellow near the inner edge. Both wings have narrow black marginal borders; the hindwing may have blue spots. It lives in North America from southern Alaska down to Mexico. Huge batches of eggs (up to 900) are laid on nettles. The caterpillar eats nettles; the adult feeds on flowers (thistles, goldenrods, and lilacs), sap and rotting fruit.