7 insects starting with the letter G — each with origin, classification, and notes.
If you've been searching for insects that start with G, you'll find 7 detailed insects below. We're not interested in giving you only a list of names — every entry on this page links to a full profile with the kind of detail you'd actually want to know.
For insects, that means taxonomy, habitat, diet, life cycle, and ecological role.
| Gall Wasp | Glow-worm | Gnat | Goliath Beetle |
| Grasshopper | Green Hairstreak | Ground Beetle |
Tiny insects that chemically reprogram oak trees to build elaborate protective structures around their larvae — the oak apple, marble gall, and spangle gall are all created by different gall wasp species; each species produces a uniquely shaped gall from its own chemical signals, essentially directing the tree's own cells to build a home and food supply.
A bioluminescent insect larva (or wingless adult female of certain beetles) that produces a steady greenish glow to attract prey or mates — including the New Zealand cave-dwelling species that creates one of the world's most spectacular natural light displays.
A general term for various small flying flies — including fungus gnats, eye gnats, and biting midges — that swarm in late summer evenings and form clouds around faces, with some species causing significant agricultural damage.
The heaviest insect on Earth — a male goliath beetle in its larval stage can weigh up to 100 grams, more than a small bird; the adults are strikingly patterned in black and white and can reach 110 mm in length; found in the tropical rainforests of Africa, they are popular in the insect-keeping hobby.
A jumping insect with powerful hind legs and short antennae, eaten across many human cultures and capable, in certain species, of transforming into devastating swarming locusts.
Britain's only green butterfly — the vivid emerald underside of its wings makes it one of the most beautiful small butterflies of spring; the upperwing is a dull brown, making it effectively invisible when perched on brown vegetation, but when it opens its wings momentarily in sunlight the green underside flashes brilliantly; associated with gorse, broom, and bilberry on heathland and downland.
A large, fast-moving, predatory beetle that hunts at night — one of the gardener's best allies, consuming slugs, aphids, and other pests by the thousand, and a key component of healthy soil ecosystems.
That's our current list of insects starting with the letter G. We add new entries every week — if you have a favorite insect starting with G that isn't on this page, let us know and we'll write it up.
Looking for more? Try insects that end with G, or contain G anywhere in the name.