October 15, 2025

Narcissus bulb fly

The Narcissus bulb fly, scientifically known as Merodon equestris, belongs to the family Syrphidae and its larvae feed on the bulbs of narcissi

Narcissus bulb fly
Merodon equestris

Conservation status: Common

When to see: March to August. Peaking between June and July

About

The Narcissus bulb fly, scientifically known as Merodon equestris, belongs to the family Syrphidae and its larvae feed on the bulbs of narcissi, eventually leading to their death. The adult fly feeds on nectar from flowers and resembles a bee, for which it’s often mistaken. Females lay eggs at the base of narcissus leaves in spring. After hatching, the maggot burrows into the bulb to feed. The patterns and hair colouration of the Narcissus bulb fly exhibits a wide range of variation.