Look-Alike Animals comparison

Damselfly vs Lacewing: Key Differences Explained

The short answer

They are not relatives, and the antennae settle it. A damselfly belongs to Odonata and carries tiny bristle-like antennae between huge, widely separated eyes, with a dark pterostigma cell near each wingtip. A lacewing belongs to Neuroptera and waves long thread-like antennae often as long as its body, folding densely veined wings roof-like over the abdomen. Damselfly larvae are aquatic hunters; lacewing larvae are terrestrial and pupate, which damselflies never do.

The main difference

A damselfly is an odonate with bristle-short antennae and aquatic nymphs; a lacewing is a neuropteran with long thread antennae and terrestrial larvae that pupate.

Fine net veining across four clear wings turns up in both orders, so photographs of a resting lacewing are regularly filed as damselfly records by people learning garden and pondside insects.

At a glance

Comparison of Damselfly and Lacewing across 7 dimensions, with an interpretation of each difference.
What differs	Damselfly	Lacewing	What it means
Antennae	Minute bristles, barely longer than the width of an eye and easy to overlook entirely	Long and thread-like, frequently as long as the body and in near-constant motion	This is the fastest check available on a settled insect, and the two conditions never grade into each other.
Wing venation	A fine network broken by a coloured pterostigma cell near the leading edge of each wingtip	A dense net whose veins fork repeatedly as they run out to the wing margin, with no stigma cell	The stigma reads as a printed marker that survives poor light and soft-focus photographs, so it rescues an identification when the antennae are hidden.
Wings at rest	Usually closed together above or along the abdomen so the body stays visible from the side	Tented roof-like over the back, covering the abdomen when seen from above	Posture works at a distance, provided you know which damselflies break the rule.Spreadwing damselflies in the family Lestidae perch with wings partly open, so posture should be confirmed against the antennae.
Larval life	Aquatic nymphs in ponds, ditches and slow streams, breathing through three leaf-shaped tail gills	Terrestrial larvae on foliage and in leaf litter, seizing prey with paired curved hollow jaws	The two groups grow up in different worlds, which is why the presence of one says nothing about the other.
Metamorphosis	Incomplete — the final nymph climbs clear of the water and the winged adult emerges directly	Complete — the larva spins a silken cocoon and pupates before the adult appears	A pupal stage is a hard taxonomic boundary rather than a matter of degree, and it puts the two names in different halves of the winged insects.
Adult feeding	Small flying insects taken on the wing and chewed with biting mandibles	Family-dependent: many green lacewings take nectar, pollen and honeydew, while others remain predatory	Adult damselflies are obligate hunters, whereas a lacewing on a flower head is doing something its larvae never do.
Flight	Controlled fluttering hops between perches, with hovering and short reversals available	Weak drifting flight that looks blown about, plus a strong attraction to lit windows after dark	Flight quality separates a daytime aerial hunter from an insect that mostly flies to move between plants.

Antennae: DamselflyMinute bristles, barely longer than the width of an eye and easy to overlook entirely
LacewingLong and thread-like, frequently as long as the body and in near-constant motion
This is the fastest check available on a settled insect, and the two conditions never grade into each other.
Wing venation: DamselflyA fine network broken by a coloured pterostigma cell near the leading edge of each wingtip
LacewingA dense net whose veins fork repeatedly as they run out to the wing margin, with no stigma cell
The stigma reads as a printed marker that survives poor light and soft-focus photographs, so it rescues an identification when the antennae are hidden.
Wings at rest: DamselflyUsually closed together above or along the abdomen so the body stays visible from the side
LacewingTented roof-like over the back, covering the abdomen when seen from above
Posture works at a distance, provided you know which damselflies break the rule.Spreadwing damselflies in the family Lestidae perch with wings partly open, so posture should be confirmed against the antennae.
Larval life: DamselflyAquatic nymphs in ponds, ditches and slow streams, breathing through three leaf-shaped tail gills
LacewingTerrestrial larvae on foliage and in leaf litter, seizing prey with paired curved hollow jaws
The two groups grow up in different worlds, which is why the presence of one says nothing about the other.
Metamorphosis: DamselflyIncomplete — the final nymph climbs clear of the water and the winged adult emerges directly
LacewingComplete — the larva spins a silken cocoon and pupates before the adult appears
A pupal stage is a hard taxonomic boundary rather than a matter of degree, and it puts the two names in different halves of the winged insects.
Adult feeding: DamselflySmall flying insects taken on the wing and chewed with biting mandibles
LacewingFamily-dependent: many green lacewings take nectar, pollen and honeydew, while others remain predatory
Adult damselflies are obligate hunters, whereas a lacewing on a flower head is doing something its larvae never do.
Flight: DamselflyControlled fluttering hops between perches, with hovering and short reversals available
LacewingWeak drifting flight that looks blown about, plus a strong attraction to lit windows after dark
Flight quality separates a daytime aerial hunter from an insect that mostly flies to move between plants.

How they are related

Damselflies are the suborder Zygoptera within Odonata, the order that also contains the dragonflies. Lacewings sit in Neuroptera, a separate order whose members include antlions and owlflies; the common name covers several families, principally the green lacewings, Chrysopidae, and the brown lacewings, Hemerobiidae. The two orders parted company deep in the history of winged insects, so the resemblance is convergence on a similar body plan rather than shared ancestry. Neither name points at a single species.

A note on naming: Damselfly covers the entire suborder Zygoptera and lacewing covers several families within Neuroptera, so both names describe groups; size, colour and wing shape vary widely between species in each.

Telling them apart

Look at the head first. A damselfly's eyes bulge from either side of a wide, dumbbell-shaped head and the antennae are almost invisible; a lacewing has a narrower head with obvious sweeping antennae, and green lacewings often show coppery or golden eyes. Then check the wingtips for a damselfly's dark stigma cell. Body colour helps too: metallic blues, greens and reds are common in damselflies, while green lacewings are a soft translucent green.

Huge eyes far apart, invisible antennae, a dark spot near each wingtip, seen by day beside water: damselfly. Long waving antennae, wings tented over the back, no wing spot, weak flight and a habit of appearing on a lit window: lacewing. If you can see a pale green insect with golden eyes indoors in autumn, it is a lacewing, because damselflies do not overwinter as adults in buildings.

Habitat and distribution

Damselflies are tied to fresh water because their nymphs live in it, so adults concentrate around ponds, ditches, canals, lake margins and slow rivers, usually within a short flight of the bank. Lacewings live wherever their prey does — hedgerows, gardens, orchards, woodland edge and scrub — and have no aquatic requirement at all. The two overlap only where vegetation borders water, which is exactly where a lacewing is most likely to be misrecorded.

Diet and ecological role

Both hunt as immatures. A damselfly nymph takes water fleas, midge larvae and other small aquatic animals, and the adult catches small flies and other soft insects in the air. Lacewing larvae are voracious predators of aphids, scale insects, mites and small caterpillars, gripping prey with hollow jaws and drawing out its fluids. Adult lacewings are less uniform: many green lacewings switch to nectar, pollen and honeydew, while brown lacewings tend to keep hunting.

Behaviour

Damselfly males patrol short stretches of bank and clasp females behind the head, the pair forming the tandem and wheel positions before eggs are inserted into plant tissue, sometimes below the waterline. Lacewings do something no odonate does: many species court by drumming their abdomens against a leaf, producing substrate-borne vibration songs that partners answer. Green lacewings of several species lay eggs on fine stalks, and some larvae pile debris and prey remains on their backs.

Senses and adaptations

A damselfly nymph carries a hinged, extendable lower lip that shoots forward to seize prey, and the adult's compound eyes give it close to all-round vision for tracking small targets against the sky. Green lacewings have their own specialism: an ultrasound-sensitive swelling at the base of each forewing that responds to bat calls and can trigger an abrupt dive. Damselflies, active in daylight, have no comparable bat-detecting organ.

More on this topic: Animal senses and adaptations.

Lifespan and life stages

In temperate regions a damselfly commonly spends several months to a year or more as a nymph, then flies for a few weeks as an adult, so almost all of its life happens underwater. Lacewings develop far faster in warm weather, sometimes running egg to adult in a few weeks and producing more than one generation a year; some species pass the winter as adults, changing from green to a duller brown. Both timetables shift with temperature and food supply.

People and these animals

Damselflies feature in freshwater monitoring because their nymphs are sensitive to water quality and their adults are countable by volunteers walking a fixed transect. Lacewings are familiar to growers as predators of aphids and other small plant feeders, and several species are reared commercially for that reason. Both turn up in garden records — damselflies wherever a pond is created, lacewings wherever mixed planting supports the small insects their larvae eat.

What they have in common

Both carry four membranous wings crossed by a fine network of veins, which is the root of the confusion between them.
Both are predators as immatures, taking smaller invertebrates rather than plant material.
Both are soft-bodied, slow enough to watch at close range, and easily damaged when handled.
Both suspend activity through the cold season in temperate regions rather than flying year-round.

Key differences

Damselflies belong to Odonata, while lacewings belong to Neuroptera, an order whose members pupate.
Damselfly antennae are bristle stubs; lacewing antennae are long and thread-like.
Damselflies develop as gilled nymphs underwater, whereas lacewing larvae develop on land.
A damselfly wing carries a pterostigma cell that lacewing wings do not have.
Adult damselflies always take live prey, while many adult green lacewings feed on nectar, pollen and honeydew.

Where people go wrong

Filing any small insect with clear, net-veined wings as a damselfly, when several neuropteran families share exactly that wing type.
Reading a lacewing's tented wing posture as a damselfly folding its wings along the back.
Expecting lacewing larvae in a pond sample because damselfly nymphs were found there.
Assuming the green colour of a garden lacewing indicates a young or newly emerged damselfly.

Frequently asked questions

Is a lacewing just a small damselfly?

No. They belong to separate insect orders that diverged long before either group looked the way it does now. A lacewing is a neuropteran, sharing an order with antlions and owlflies, and it passes through a pupa. A damselfly is an odonate whose nymph lives underwater and moults straight into the flying adult. The similarity is limited to having four clear, net-veined wings.

What separates a damselfly from a lacewing on a photograph?

Two features usually decide it without needing scale. First, the antennae: damselfly antennae are bristle stubs, while lacewing antennae are long threads that often trail past the wing base. Second, the wingtip: damselflies carry a dark, thickened pterostigma cell near the leading edge, which lacewings lack. Wing posture helps as a third check, since lacewings tent their wings over the abdomen.

Do lacewings breed in ponds the way damselflies do?

They do not. Lacewing eggs are laid on vegetation, in several green lacewing species on slender stalks, and the larvae hunt on the same plants before pupating in a silken cocoon. Damselflies must have standing or slow-moving fresh water because the nymph is fully aquatic and breathes through leaf-shaped gills at the end of the abdomen. A garden pond will bring in damselflies and does nothing for lacewings.

Why do lacewings come to lit windows when damselflies do not?

Lacewings are largely active at dusk and after dark and are drawn to artificial light, so they collect on lit glass and drift indoors, which is where most people meet them. Damselflies are daytime insects that roost in vegetation once the light and temperature drop, and they rarely fly at night. If a delicate net-winged insect appears on a window after sunset, it is far more likely to be a lacewing.

Are damselflies and lacewings each part of a bigger family group?

Both names cover groups rather than species. Damselfly means the whole suborder Zygoptera, thousands of species worldwide, sharing an order with dragonflies. Lacewing usually means the green lacewings and brown lacewings, two families in Neuroptera, an order that also holds antlions, owlflies and mantidflies. That is why the pages compare typical members: individual species differ in size, colour, wing shape and habits.

Read the full profiles

Sources and methodology

How this comparison is built: FaunaHub comparisons are assembled from the sourced animal profiles behind them rather than written as standalone claims. Figures such as size, mass, and lifespan are typical ranges that vary by subspecies, population, region, sex, age, and — where relevant — whether an animal lives in the wild or under human care, so they are presented as ranges rather than fixed values. Where a common name covers a group rather than a single species, the page says so instead of implying a species-to-species match. Conservation status changes over time and should be confirmed against the current IUCN Red List. Dimensions that could not be supported from the underlying profiles are omitted rather than filled in.

What this page does not do: it does not rank the two animals, predict the outcome of a confrontation, or present either one as stronger, smarter, or better. It is not veterinary, medical, first-aid, handling, capture, hunting, or pest-control guidance. For an animal in your care, or any situation involving injury, contact a qualified veterinarian, your local wildlife authority, or emergency services.

Sources and further reading

Authoritative references used for general educational context. External links open in a new tab. These sources do not endorse FaunaHub.

UniversityAnimal Diversity Web — Odonata (dragonflies and damselflies) — University of Michigan species account
UniversityAnimal Diversity Web — Calopteryx splendens (banded demoiselle) — University of Michigan species account
Wildlife referenceXerces Society for Invertebrate Conservation — Science-based invertebrate conservation resources
ReferenceEncyclopaedia Britannica — Animals reference — Editor-reviewed encyclopedia overview entries
Wildlife referenceIUCN Red List of Threatened Species — Authoritative source for current conservation status
UniversityAnimal Diversity Web — University of Michigan Museum of Zoology — Peer-edited reference accounts for animal species
ReferenceBritannica — Lacewing — Editor-reviewed encyclopedia entry

Last updated: 2026-08-04