Seven-spot vs harlequin ladybird: the four field marks that separate them

Two red ladybirds sitting on a rose stem. One is a seven-spot, one is a harlequin. From above they look nearly identical: same domed red body, similar size, black spots. Count the spots and you might still get it wrong. The trick is not the spots at all. It is the collar.

The seven-spot: what to look for

The seven-spot ladybird (Coccinella septempunctata) is what most people picture when they think "ladybird." It is consistent in a way that makes identification straightforward once you know the details:

• Spot count: always 7. Three spots on the left wing case, three on the right, and one shared spot at the centre base where the two wing cases meet at the front. Count them and you will always arrive at seven.
• Background colour: a reliable orangey-red, the same between individuals. Not orange, not dark crimson. A warm mid-red.
• Collar (pronotum): the plate behind the head is black with a distinct white or cream rectangular mark on each side. Two white rectangles, placed symmetrically. This is the fastest field mark at close range.
• Eyes: dark brown to black.
• Shape: neatly oval, moderately domed.

The seven-spot is found across Europe and into Central Asia. It is active from early spring through to autumn, when it retreats under bark or into dense vegetation to hibernate. A key fact from the Kaught catalog: when threatened, it produces a bitter yellow fluid from its leg joints, not blood, a defensive secretion that tastes foul to most predators. It works.

The harlequin: the shape-shifter

The harlequin ladybird (Harmonia axyridis) arrived in western Europe from Asia. First recorded in Britain around 2004, it is now one of the most frequently encountered ladybirds across much of England. It is larger on average than the seven-spot (6 to 8 mm, similar range), similarly domed, and similarly red. That is where consistency ends.

The harlequin's spot count ranges from 0 to 21. Its background colour can be orange, red, or predominantly black with red spots. Some forms are almost unrecognisable as a typical ladybird at first glance. Counting spots on a harlequin tells you almost nothing.

The one consistent feature is the collar. The harlequin's pronotum is white or cream with a black pattern. That pattern is usually described as an M or W shape (depending on which way you look at it), though it varies between a clean M and a more complex arrangement of spots. It is still distinctly different from the seven-spot's two clean white rectangles on black.

Four field marks that separate them

Go through these in order:

1. Collar (pronotum) background: is it black with white marks (seven-spot) or white/cream with black marks (harlequin)? This alone resolves most IDs.
2. Collar pattern shape: two symmetrical rectangles (seven-spot) vs an M or W shape or irregular black marks (harlequin).
3. Spot count: if you count exactly 7 well-separated, clean black spots, seven-spot. If you count more, fewer, or find yourself losing count on an inconsistent pattern, harlequin.
4. Eye colour: dark in the seven-spot, often red or orange in the harlequin. Requires close view, but diagnostic when seen.

What each species actually does

Both species eat aphids. The seven-spot is one of the most effective natural aphid controls in the garden: a single larva eats several hundred aphids before it pupates, and adults continue eating through summer. The larvae are grey-black with yellow or orange markings and look nothing like the adult. If you see something small and spiky that does not look like a ladybird on your rose stems, it may well be a seven-spot larva already dealing with your aphid problem.

Harlequins also eat aphids. In good aphid years, they are useful. In poor aphid years, or at high density, they supplement their diet with other insects, including the eggs and larvae of other ladybird species. Seven-spot larvae are among the species eaten. The harlequin is not limited to aphids when its preferred prey becomes scarce.

Neither species harms people. Neither can sting. Both produce the bitter yellow reflex-bleed fluid as a defence, which can occasionally stain skin or fabric if you handle them. Large numbers of harlequins sometimes try to enter buildings in autumn to overwinter, which can become an annoyance, but individual harlequins are harmless.

Why it matters which one you have spotted

From a recording perspective, the distinction matters. The UK Ladybird Survey tracks harlequin spread across Britain, and citizen-science records from verified sightings contribute to understanding where the species has established. If you photograph a ladybird and record the collar pattern clearly, you have a verifiable record either way.

From a Kaught catalog perspective, the seven-spot is catalog No. 031, Common rarity, one diamond. A straightforward record in any garden from April to October. The harlequin is not currently catalogued separately, but any ladybird you photograph that does not resolve cleanly to seven-spot is worth a second look at the collar. Recording precisely is the point.

For other ID-safety questions in the garden and hedgerow, see our guide on the grass snake vs adder, and for a different perspective on the insect world, the robin's year-round territorial behaviour is partly driven by hunting the same invertebrate layer that ladybirds occupy.