Corixidae

Common Name

Water Boatmen

Overview

Corixidae, commonly known as water boatmen, are a family of aquatic insects widely distributed across the globe in freshwater habitats.

Taxonomy

• Kingdom: Animalia
• Phylum: Arthropoda
• Class: Insecta
• Order: Hemiptera
• Family: Corixidae

Key Characteristics

• Body shape: Elongate and flattened
• Size: Typically 2-12 mm
• Color: Generally brown or dark green with lighter markings
• Legs: Front legs modified for feeding, middle and hind legs adapted for swimming
• Mouthparts: Piercing-sucking, adapted for feeding on algae and detritus
• Antennae: Very short and inconspicuous

Life Cycle

• Egg: Laid on submerged vegetation
• Nymph: Aquatic, undergoes several molts
• Adult: Aquatic and capable of flight

Behavior and Ecology

• Habitat: Found in a variety of freshwater habitats including ponds, lakes, and streams
• Diet: Algae, detritus, and small invertebrates
• Behavior: Skilled swimmers, using their oar-like hind legs to move
• Breathing: Use a plastron or air bubble to breathe underwater

Notable Species

• Sigara dorsalis: One of the most widespread species in North America
• Trichocorixa verticalis: Known for its adaptability to various freshwater environments

Conservation

• Generally not endangered
• Populations can be indicators of water quality and ecosystem health

Significance to Humans

• Play a role in the aquatic food web
• Can be an indicator of healthy water ecosystems
• Occasionally enter swimming pools, which can be a minor nuisance

Fun Facts

• Water boatmen can sometimes be heard "singing" underwater by stridulating, or rubbing body parts together.
• Despite their aquatic lifestyle, water boatmen are strong fliers and can travel between water bodies.
• Some Corixidae species can survive in slightly saline waters, making them quite adaptable.