Mydidae

Common Name

Mydas flies

Overview

Mydidae, commonly known as Mydas flies, are a family of large, often striking dipterans with elongated bodies. They are distributed globally but are most numerous in the tropics.

Taxonomy

• Kingdom: Animalia
• Phylum: Arthropoda
• Class: Insecta
• Order: Diptera
• Family: Mydidae

Key Characteristics

• Elongated, robust bodies, often mimicking wasps.
• Large compound eyes.
• Prominent antennae, typically with a characteristic clubbed shape.
• Generally black or darkly colored, sometimes with orange or yellow markings.
• Wings are clear or slightly smoky; veins are well-defined.

Life Cycle

• Egg: Laid in soil or decaying wood.
• Larvae: Predaceous, often found in decaying wood or soil, feeding on other insect larvae.
• Pupa: Pupates within the soil or in decaying matter.
• Adult: Emerges, seeks nectar and mates; adult lifespan is relatively short.

Behavior and Ecology

• Adults are typically diurnal and often found on flowers, feeding on nectar.
• Larvae are predaceous and play a role in controlling pest populations.
• Adults are strong fliers and can often be seen flying swiftly or hovering near flowers.

Notable Species

• Mydas clavatus: Recognizable by its large size and distinctive orange-banded abdomen.
• Mydas brunneus: Noted for its brown body and habitat preferences in North America.

Conservation

• Some species are considered rare, and habitat destruction is a concern.
• Efforts in habitat conservation help maintain populations, though specifics on conservation status vary by region.

Significance to Humans

• Larval predation can benefit agricultural ecosystems by controlling pest populations.
• Some species are of interest to biological control programs.
• Their striking appearance and mimicry make them subjects of fascination for entomologists and naturalists.

Fun Facts

• Mimicry: Many Mydas flies exhibit Batesian mimicry, resembling stinging wasps to deter predators.
• Size: Mydas clavatus is one of the largest flies in North America.
• Nectar feeders: While larvae are predatory, adults primarily feed on nectar, making them harmless to humans.
• Flight speed: Known for their powerful flight, some Mydas flies can be difficult to capture due to their agility.
• Diversity: There are around 500 recognized species of Mydidae globally, many of which still remain a mystery to science.