Several common bugs have a teardrop or pear-shaped body, and the one you’re looking at depends on its size, color, and where you found it. The most likely candidates are silverfish, carpet beetle larvae, bed bugs, ticks, kissing bugs, or scale insects on houseplants. Each looks and behaves differently enough that a few details can narrow it down fast.
Silverfish: The Classic Teardrop
Silverfish are probably the most recognizably teardrop-shaped bug you’ll encounter indoors. Their bodies are wide at the head and taper gradually to a narrow rear end that splits into three long, thin tail-like appendages. They also have two long antennae at the front. Adults are about half an inch long, though they can reach three-quarters of an inch. The common silverfish is shiny silver or pearl gray, while its close relative the firebrat is a mottled gray or brown.
Both are wingless, soft-bodied, and completely nocturnal, so you’ll almost never see them during the day. They leave behind tiny, dustlike scales that are slightly iridescent in light and stick to surfaces. If you’re finding damage to books, wallpaper, clothing, or dry foods and notice those shimmery scales nearby, silverfish are the likely culprit.
They thrive in humid environments: bathrooms, laundry rooms, basements, and shower stalls. They also gravitate toward bookcases, closets, and anywhere starch or paper is available. Freshly laid concrete and green lumber can supply the humidity they need, while wallpaper paste doubles as food. Keeping these spaces clean and dry is the most effective prevention. During the day, silverfish and firebrats crowd together in a central hiding spot, which is also where females lay their eggs, so finding that resting site can help you target an infestation.
Carpet Beetle Larvae: Fuzzy and Tear-Shaped
If the teardrop-shaped bug you found is small, hairy, and near fabrics or carpeting, it’s likely a carpet beetle larva. The varied carpet beetle larva is distinctly teardrop-shaped and covered in rows of light brown hairs. The black carpet beetle larva is more carrot-shaped with golden brown hairs and a characteristic tuft of long hairs at its rear end, measuring 3 to 7 mm long.
The adults look quite different. Varied carpet beetle adults are tiny (2 to 3 mm), oval to round, with a gray calico pattern of white and yellow splotches. Black carpet beetle adults are larger, solid dark brown or dull black, and shaped like an elongated oval. It’s usually the larvae that cause damage, feeding on wool, silk, feathers, pet hair, and other natural fibers. If you’re finding small irregular holes in clothing or bare patches in rugs, check for these larvae along baseboards, inside closets, and under furniture. Thorough vacuuming and laundering affected items are the first steps to controlling them.
Bed Bugs: Oval but Often Mistaken
Unfed bed bugs are about 3/16 of an inch long, roughly the size of an apple seed, and oval-shaped. They’re reddish brown, wingless, and flat enough to hide in mattress seams and crevices. After feeding, their shape changes dramatically: the body swells and elongates into something more torpedo-like, turning bright red. Over the next couple of days, the bug darkens and flattens again as it digests.
Bed bug bites typically form raised bumps in a zigzag pattern on skin that contacts your bed, including your arms, legs, and back. If you suspect bed bugs, checking mattress seams, headboard joints, and nearby furniture cracks is the place to start. Professional pest control is generally necessary for bed bug infestations, as they’re extremely difficult to eliminate with home methods alone.
Ticks: Teardrop When Engorged
An unfed tick is flat and oval, but once it’s been feeding for a day or more, it swells into a pronounced teardrop or balloon shape. If you found a plump, grayish or brownish teardrop-shaped bug attached to your skin or your pet, it’s almost certainly an engorged tick.
Common species include the deer tick (also called the black-legged tick), the American dog tick, and the lone star tick. Deer ticks are the primary carriers of Lyme disease, anaplasmosis, and babesiosis. American dog ticks can transmit Rocky Mountain spotted fever. Lone star ticks carry ehrlichiosis and are expanding their range northward. Tick bites most commonly occur on the back of the neck, scalp, and legs, and they cause a small red raised spot or rash at the bite site.
If you find one attached, grasp it with fine-tipped tweezers as close to the skin as possible and pull straight out. Don’t squeeze the middle of the body. You can preserve the tick in rubbing alcohol if you want it tested later. After spending time outdoors, shower within two hours, check your entire body (especially the hairline, ears, underarms, belly button, waist, and behind the knees), and toss your clothing in the dryer on high heat for at least 10 minutes before washing. Heat kills ticks; water alone does not.
Kissing Bugs: Larger and More Concerning
Kissing bugs are half an inch to a full inch long, making them noticeably bigger than most other teardrop-shaped insects you’d find indoors. They’re dark brown to black with distinctive orange or red striped markings along the edges of their abdomens. Males have rounded rear ends, while females have pointed tips for egg-laying.
These bugs are a health concern because they can carry a parasite that causes Chagas disease. The parasite lives in the bug’s feces, not its saliva, so transmission happens when feces enters the body through a bite wound, the eyes, or the mouth. About one in three infected people eventually develop chronic Chagas disease, which can cause heart problems that take years or even decades to appear. The acute phase, if symptoms occur at all, involves fever, fatigue, body aches, headache, and sometimes rash or digestive symptoms lasting weeks to months. Kissing bugs are found primarily in the southern United States and Latin America, and they tend to bite at night around the face.
Scale Insects: Teardrop Bumps on Plants
If the “bug” you noticed is a tiny, immobile teardrop-shaped bump stuck to a houseplant stem or leaf, it’s likely a scale insect. Fern scale, for example, has mature female covers that are pear or oyster-shell shaped, flat, light to dark brown, and up to 3/16 of an inch long. Brown soft scale is another common species on indoor plants.
Scale insects don’t look like typical bugs because adults anchor themselves to the plant and stay put, feeding on sap beneath a protective shell. Signs of a scale problem include yellowing leaves, premature leaf drop, stunted growth, and a sticky residue called honeydew on leaves and nearby surfaces. That stickiness can attract ants and support the growth of dark sooty mold. Heavy infestations cause wilting, reduced vigor, and can eventually kill the plant. You can scrape individual scales off with a fingernail or cotton swab dipped in rubbing alcohol. For heavier infestations, horticultural oil or insecticidal soap applied directly to the insects is effective.
How to Tell Them Apart Quickly
- Found on your body or a pet, swollen and attached: engorged tick
- Found in bed or mattress seams, flat, apple-seed sized: bed bug
- Found in a bathroom or bookshelf, silver and fast-moving with tail bristles: silverfish
- Found near fabrics or carpet, small and fuzzy: carpet beetle larva
- Found stuck to a houseplant stem, immobile: scale insect
- Found indoors at night, half-inch or larger with striped abdomen edges: kissing bug
Size is one of the fastest ways to sort them out. Scale insects and carpet beetle larvae are just a few millimeters long. Silverfish and bed bugs fall in the quarter-inch to half-inch range. Ticks vary depending on how long they’ve been feeding but start small. Kissing bugs are the largest of the group at up to an inch. Color, location, and whether the bug is moving or stationary will usually confirm your identification from there.