Ground Beetles Ground beetles are very variable, colours range from all black, dark violet, brown striped, iridescent green, and many more. Some have long narrow ‘elegant’ shapes while others are more rounded in outline. They have long antennae and hard wing covers that protect their wings if they have them, as many (like ladybirds) can fly . They feed on a great variety of foodstuffs, including decaying matter, some on fungus, a few on dung, some are plant-feeders, but a large number are the gardeners’ especial friend, preying on caterpillars, wireworms, maggots, ants, aphids and slugs. What’s not to like?