What they look like: Adult harlequin bugs have vibrant red (sometimes orange) and black markings and are about 9.5 millimeters long with “flat, shield-shaped bodies,” Ramsey says.

BED BUGS have mastered the art of disguise but they leave one key clue behind - bite marks. Red spots that have become raised may indicate you have been bitten by seed-sized insects.

Éanna Ní Lamhna on the hawthorn shield bug, underground bees, and the red-listed yellowhammer. ... This is an insect, a hawthorn shield bug that has wakened up from its overwintering state.