Is That a Tiny Hummingbird? How to Identify the Hummingbird Moth

Every summer the same double-take plays out in gardens across North America: a small, plump creature hovers in front of a flower cluster, wings a humming blur, unrolling a long tongue to drink nectar without landing. It looks exactly like a miniature hummingbird — until you notice the antennae, the furry body, and the fact that it is barely two inches long. What you are watching is a hummingbird moth, one of the most charming cases of mistaken identity in the backyard, and late summer is peak season for it.

Hummingbird or Moth? How to Tell at a Glance

Hummingbird moths are sphinx moths (also called hawk moths) that have evolved to feed like hummingbirds — hovering at flowers in broad daylight. Unlike most moths, they are active during the day, which is exactly why they get confused with birds. A few features settle it quickly:

• Size: a hummingbird moth is roughly 1 to 2 inches long — noticeably smaller than even the tiniest hummingbird, which is closer to 3 to 4 inches
• Antennae: it has two obvious clubbed antennae on its head; a hummingbird never does
• Body: it is stout and distinctly furry, like a bumblebee, rather than sleek and feathered
• Tail: many hold a fan-shaped tuft of scales at the rear that flares like a tiny lobster tail or a bird’s tail as they hover
• Wings: the wings are often partly clear, with a dark border, and beat in a fast blur that produces an audible hum

If the "bird" at your bee balm has antennae and a fuzzy insect body, you are looking at a moth. The overall impression — hovering flight, whirring wings, a long tongue dipping into flowers — is a beautiful example of convergent evolution, where two very different animals arrive at the same solution for the same job.

The Two You Are Most Likely to See

In North America, two clearwing hummingbird moths turn up in gardens far more than any others, and they are easy to tell apart once you know what to look for:

• Hummingbird clearwing (Hemaris thysbe) — the classic one, with a fuzzy olive-to-golden back, a reddish-brown or burgundy abdomen, and pale, whitish legs. It reads as reddish and olive overall
• Snowberry clearwing (Hemaris diffinis) — a bumblebee mimic, banded black and yellow with black legs and a black line running through the eye and down the side. People routinely mistake it for a large bee

Both have the signature clear wing panels with a dark outer edge, and both hover the same way. There is also a larger, spectacular relative — the white-lined sphinx — that flies at dusk and is sometimes lumped in with "hummingbird moths," but the two clearwings are the daytime hoverers you will actually see at the flower bed.

Are Hummingbird Moths Good or Bad for the Garden?

Good — genuinely. Adult hummingbird moths are pollinators, moving pollen between flowers as they feed, and they are completely harmless to people. They do not sting or bite, and they are a delight to watch. Their caterpillars are hornworms (they carry a small horn at the rear, like the tomato hornworm), and they feed on plants such as honeysuckle, snowberry, viburnum, and hawthorn, but they rarely occur in numbers that cause any real damage. On balance, a hummingbird moth in the yard is a sign of a healthy, flower-rich garden, not a pest problem.

If you want to attract more of them, plant the tubular, nectar-rich flowers they favor — bee balm, phlox, blazing star, honeysuckle, and butterfly bush among them — and go easy on broad-spectrum insecticides, which take out the good visitors along with the bad.

When You Want to Be Sure

Between the two clearwings, the dusk-flying sphinx moths, and the actual hummingbirds visiting the same flowers, it is easy to be unsure of exactly what just buzzed your garden. Snap a photo of the hoverer and Spotter will identify whether it is a hummingbird, a hummingbird moth, or one of its relatives — and tell you which flowers it came for.