These beetles become very abundant in late summer and early autumn. As their name implies, they are fond of goldenrod flowers, but they are also common on asters and other late-blooming flowers. In addition to pollen and nectar, the adult beetles eat aphids and other herbivorous insects, so these beetles are a gardener’s friend. The larvae are also predaceous, feeding on the eggs and larvae of other insects.
Other species in this family have red markings like British soldiers, hence the name.