🪰 A biting insect 🎣 A fishing lure

deer fly

5.1

A small fly near water that bites people and animals painfully

noun
/dɪr flaɪ/

: mosca ciervo

I was bitten by a deer fly while fishing by the river.

Examples

She wore a hat to protect herself from deer flies on the hiking trail.
The deer fly population increases during the summer months near wetlands.
The deer fly bit me while I was fishing.
I hate how deer flies swarm around the lake.
I was bitten by a deer fly while fishing by the river.
The deer fly population increases during the summer months near wetlands.
She wore a hat to protect herself from deer flies on the hiking trail.

Synonyms

deerfly

vsdeer fly

1 7.4

A small biting fly that lands on people and animals to suck blood

focuses on being near water with a notably painful, bothersome bite

greenhead

vsdeer fly

1 9.3

A large greenish fly that bites people near marshes

is smaller and defined by proximity to water and a painful bite

Chrysops

vsdeer fly

Specialized

9.9

A small biting fly like a deer fly that can bite people and carry disease

is the common description that highlights watery habitat and painful bites

Surface Forms

deer fly singular

deer flies plural

Morphology

deer + fly

This is a straightforward noun–noun compound where 'deer' modifies 'fly' to indicate a type of fly (originally an insect) or a fly imitation related to deer; a B1 learner who knows 'deer' and 'fly' can infer it denotes a specific kind of fly or fly-pattern. The formation is compositional and follows common cross-linguistic modifier+head patterns, so the meaning is directly derivable from the parts.

Etymology

Deer fly is named for a small fly that often bites animals like deer. The simple image of a tiny insect attacking a big animal helps explain why the name means a painful biting fly that can bother people too.