Insects Active during the day

Magnolia scale

Neolecanium cornuparvum

iNaturalist

Often mistaken for plant buds, the Magnolia scale is a giant among scale insects. These sap-sucking specialists create a miniature ecosystem on magnolia branches, attracting ants and wasps to their sticky honeydew.

0 Sightings

0 Habitats

Quick Identification

straighten

Size

Adult females range from 10-13 mm (0.4-0.5 inches) in diameter, while males are much smaller and fly-like.

palette

Colors

Females transition from a white, waxy 'bloom' to a smooth, pinkish-orange or tan; nymphs are dark brown or gray.

visibility

Key Features

One of the largest scale insects in North America
Convex, bumpy appearance resembling tree galls or buds
Produces copious amounts of sticky honeydew and black sooty mold

When You’ll See Them

schedule

Activity pattern Active during the day

brightness_5

Peak hours Continuous feeding; crawler movement is most visible during daylight hours in late summer.

calendar_month

Season July-September

restaurant

Diet Phloem sap specifically from Magnolia species, extracted via piercing-sucking mouthparts.

park

Habitat Suburban gardens, urban parks, and nurseries where Magnolia trees are planted.

public Geographic range

Where Does the Magnolia scale Live?

The Magnolia scale is native to the Eastern and Central regions of North America. Its range extends from the Gulf Coast of the United States northward through the Great Lakes region and into Southern Canada, specifically Ontario and Quebec. It is most commonly encountered in temperate zones where its primary host plants, such as the Star or Saucer Magnolia, are popular in residential landscaping.

Basemap © OpenStreetMap contributors

2 Countries

4.5M km² Range

Least Concern Conservation

US United States

Marginal

CA Canada

Marginal

eco

iNaturalist / Verified observation data

View on iNaturalist open_in_new

Explore more Insects arrow_forward

Behavior

The Magnolia scale is a specialized sap-sucking insect that spends the majority of its life cycle anchored to the bark of Magnolia trees. Unlike many insects that move frequently, adult female Magnolia scales are sessile, meaning they remain in one spot, piercing the plant tissue with needle-like mouthparts to drink nutrient-rich phloem. They are often first noticed by the 'honeydew' they excrete—a sticky, sugar-rich liquid that coats the tree and everything beneath it.

These insects exhibit a fascinating symbiotic relationship with other backyard wildlife. Ants are frequently seen 'farming' the scales, protecting them from predators in exchange for the sugary honeydew. Meanwhile, the accumulation of this sticky residue often leads to the growth of black sooty mold, which can turn the entire trunk and leaves of a tree a charcoal color. In late summer, the scales produce 'crawlers,' the mobile nymph stage that travels to find new feeding grounds before overwintering.

photo_camera EverydayEarth exclusive

Camera Tips

Capturing the Magnolia scale on camera requires a different approach than most wildlife, as the adults do not move. To get the best results, use a macro lens or a camera with a dedicated 'macro' mode. Focus your lens on the undersides of 1-to-2-year-old magnolia twigs. Because they are stationary, time-lapse photography is the most effective way to observe their development; setting a camera to take a photo every few days from June through August will show the dramatic shift from white waxy nymphs to large, tan adults.

To capture 'action,' aim your camera at a cluster of scales during the day to record the parade of visitors they attract. You will likely see ants tending to the scales, as well as various species of wasps, flies, and bees arriving to feed on the honeydew. These interactions are often very high-energy and make for excellent short video clips. Ensure your camera is mounted on a very stable branch or a tripod, as even a light breeze can cause the branch to move out of focus.

Late August and early September are the best times to see the mobile 'crawlers.' These tiny, dark nymphs are only about the size of a pinhead, so you will need to get as close as possible. Lighting is your best friend here—use a side-mounted light or a flash to create shadows that reveal the texture and convex shape of the scales against the bark. Avoid direct midday sun, which can wash out the white waxy coating on the insects.

Similar Species

Species that look similar or are commonly confused with Magnolia scale.

Tuliptree scale

Slightly smaller and flatter, primarily attacking Tuliptrees and sometimes Magnolia, whereas Magnolia scale is more host-specific.

European fruit lecanium

Much smaller and typically found on a wider variety of fruit and shade trees rather than just Magnolias.

Browse all Insects arrow_forward

Frequently Asked Questions

The adult females are stationary and feed continuously day and night, but the 'crawlers' (young nymphs) and the insects they attract, like ants and wasps, are most active during the warm daylight hours of late summer.

The best way to see them is to plant their host trees, specifically Star Magnolia (M. stellata) or Saucer Magnolia (M. x soulangeana). They are common in areas where these trees are already established.

They feed exclusively on the sap (phloem) of Magnolia trees, using their specialized mouthparts to pierce the bark of young twigs.

Yes, they are very common in suburban landscapes wherever Magnolias are used as ornamental plants, often reaching high populations in urban environments.

The Magnolia scale is typically larger and becomes much more convex (humped) than the Tuliptree scale. Magnolia scale also typically has a heavier white waxy coating in its early stages.

Record Magnolia scale at your habitat

Connect a camera to start building your own species record — AI identifies every visitor automatically.

Join free Identify a photo