“A single ladybug can devour up to 50 to 100 aphids in a single day, and up to 5,000 during its lifetime!”
Seven-spotted ladybugs are small predatory beetles common in fields, gardens, and crop edges. Both adults and larvae consume aphids and other plant-feeding insects; when threatened, an adult can release bitter yellow fluid from its leg joints.
By An Nguyen · Published · Updated
Measured against the 176 species profiled on this site. Each figure is converted to one unit system from the published range on the page, so the ranks are computed, not quoted.
| Measure | This species | Rank here | Exceeds |
|---|---|---|---|
| Body mass | 0.05 g | #176 of 176#11 of 11 Insecta | 0% |
| Body length | 1 cm | #176 of 176#11 of 11 Insecta | 0% |
| Lifespan in the wild | 2 yr | #163 of 169#6 of 11 Insecta | 3% |
Closest in body mass
Ranks use the upper end of each published adult range, so they compare typical large adults rather than records, and metrics with no published number are left out rather than estimated. The full table is downloadable from the species dataset, and any two species can be put side by side in the comparison tool.
Browse photographs of ladybug across habitat, behavior, anatomy, and life stages.
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Core article
A closer look at habitat, diet, behavior, reproduction, and conservation.
The seven-spotted ladybug (Coccinella septempunctata), also called the ladybird, is a domed, red beetle with black spots and a common symbol of good luck in folklore. This carnivore is used in biological pest control because it eats soft-bodied, sap-sucking insects that damage crops and gardens. Its red-and-black color is aposematic, warning predators of its chemical defenses.
A mature seven-spot is small — 7 to 10 millimeters and a fraction of a gram — and convex, its hardened wing covers (elytra) red or orange with exactly seven black spots. That vivid pattern is a warning to birds and amphibians that the beetle is bitter and toxic. The heavy elytra are useless for flight, so to fly the ladybug lifts them and unfolds a pair of delicate translucent hind wings, letting it travel far in search of aphid colonies. Its main defense is reflex bleeding: threatened by an ant or spider, it deliberately ruptures leg joints to exude a foul, bitter, alkaloid-rich fluid that repels attackers. Strong chewing mandibles handle its soft-bodied prey. It belongs to the beetle family Coccinellidae, which holds over 5,000 species, most of them predatory.
Native to Europe, North Africa, and Asia and now abundant across North America (where it was introduced for pest control), the seven-spot is a highly adaptable generalist that lives wherever vegetation supports its prey. It thrives in crop fields, orchards, and gardens — directly benefiting agriculture — as well as grasslands, meadows, temperate forests, and shrublands, using trees and shrubs both to hunt in summer and to shelter through winter.
Both adults and larvae prey on aphids, spider mites, scale insects, mealybugs, thrips, and insect eggs. One adult can eat 50 to 100 aphids a day and perhaps 5,000 over its life. Ladybugs hunt actively, using their antennae to detect chemical signals released by plants when sap-sucking insects feed, then flying toward the affected plant.
Through the warm months ladybugs are solitary hunters, meeting only briefly to mate. As temperatures drop and food fails in late autumn, their behavior flips: they enter dormancy (diapause) and, using aggregation pheromones, draw thousands or even millions of individuals to a single overwintering site, clustering under logs, rocks, and leaf litter — or inside houses — to conserve heat and energy until spring.
Ladybugs undergo complete metamorphosis through egg, larva, pupa, and adult. In spring the female seeks an aphid-rich plant and lays clusters of 10 to 50 spindle-shaped yellow eggs on the undersides of leaves — up to 1,000 in her lifetime — placing food near the hatchlings. The larvae hatch in 3 to 10 days and feed and grow for several weeks, molting four times. The mature larva anchors by its tail and pupates for 7 to 15 days; the adult emerges soft and pale, and its spots and red pigment develop within hours. Adults typically live 1 to 2 years.
The seven-spot is Least Concern, abundant and stable thanks to its adaptability, high reproduction, and wide introduction. But its success sits alongside trouble for other ladybirds. The introduced harlequin (Asian) lady beetle outcompetes native species for food and even eats their larvae; broad-spectrum insecticides kill beneficial beetles along with the target pests; and the loss of hedgerows to monoculture farming removes the overwintering sites and alternative foods native ladybugs need.
Kingdom
Animalia
Phylum
Arthropoda
Class
Order
Coleoptera
Family
Coccinellidae
Genus
Coccinella
Species
C. septempunctata
A single ladybug can devour up to 50 to 100 aphids in a single day, and up to 5,000 during its lifetime!
When threatened, ladybugs can play dead and leak a smelly, bitter yellow liquid from their leg joints to scare off predators.
A ladybug's spots fade as it gets older, and their bright red color warns birds that they taste terrible.
Their hard, shiny red wing covers are called elytra. They protect their delicate flying wings folded underneath.
In the winter, thousands of ladybugs gather in dense clusters under logs, rocks, or leaves to hibernate together.
In many cultures around the world, ladybugs are considered symbols of good luck and good fortune.
Select a question to reveal the answer.
Ladybugs live in temperate climates across Europe, Asia, and North America. They are commonly found in meadows, gardens, forests, fields, and lawns where plants are abundant.
Ladybugs are carnivores that feed primarily on soft-bodied pests such as aphids, mites, and scale insects. Both adult ladybugs and their spiky larvae eat massive numbers of pests.
Yes. Ladybugs are helpful in gardens because many species eat aphids and other insects that damage plants.
Bright colors and spots warn predators that ladybugs may taste bad or release defensive chemicals.
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