Entoma
Waved sphinx, Ceratomia undulosa, plate

Hawk moths

Ceratomia undulosa

Waved sphinx

Adult Waved Sphinx moths never feed at all, living for only a week or two on fat reserves built up as caterpillars.

WhereWoodlands, hedgerows and gardens
Size76 to 110 mm wingspan
WhenApril to September

This large sphinx moth has pale gray to brown forewings crossed by wavy black lines, a pale spot near the center of each forewing, and a black and white checkered fringe along the hindwing margin.

Caterpillars feed on the leaves of ash, oak, hawthorn and privet, and the moths overwinter as pupae underground, emerging as adults that live only briefly since they do not feed.

Traits

Habitat

Woodland

Colour

Brown, Grey, White

Active

Night

To people

Harmless to people; adults do not feed and cannot bite or sting.

Activity through the year

Often confused with

Elm sphinxnot in guide
Ceratomia amyntor

Elm Sphinx forewings carry a bold white discal spot and a black and cream zigzag banding along the body, but lack the T-shaped margin marks and checkered fringe that pattern the Waved Sphinx, though the two moths overlap broadly in size.

Questions

Is the Waved sphinx dangerous to people?

Harmless to people; adults do not feed and cannot bite or sting.

When can you see the Waved sphinx?

The Waved sphinx can be seen from April to September, at night.

Plate retouched from a photo by John P Friel, CC BY 4.0, iNaturalist Licence

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Last updated 2026-09-27. Every entry is checked against published sources.