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Caddisfly on a Waterside Leaf

A caddisfly rests on a broad leaf growing near the edge of a pond.

A large caddisfly with tent-like folded wings resting on a leaf.
Caddisfly on a Waterside Leaf
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A Caddisfly Settled on a Pond Leaf

A caddisfly sits atop a leaf, viewed in a posture typical of pond habitats. Its long antennae extend forward, while its wings are folded tightly over its back like a roof.

Interesting Facts About Caddisflies

Before transforming into winged adults, caddisfly larvae live underwater and construct protective cases around their bodies. They bind tiny pebbles, sand grains, bits of wood, or small shell fragments together using waterproof silk produced by their salivary glands. These natural cases shield the soft larvae from hungry fish and swift water currents.

True Colors of a Caddisfly

  • Caddisfly wings: muted brown, gray, or mottled tan with tiny hairs
  • Caddisfly antennae: dark brown or yellowish-gray with fine segments
  • Caddisfly body: dull brownish-black or dark olive
  • Waterside leaf: deep green or bright yellowish-green
Questions and answers

Questions and Answers

How do caddisflies differ from moths and butterflies?
Although they look similar, caddisflies have wings covered in tiny silky hairs instead of colorful scales. They also possess long, thread-like antennae held straight forward when resting.
Where can you find adult caddisflies in nature?
Adult caddisflies are most commonly found clinging to vegetation, tree bark, and rocks along the damp edges of rivers, streams, and freshwater lakes. They are active mostly during dusk and night hours.
What do caddisfly larvae use to build their underwater homes?
Larvae collect small materials from the stream bed, such as grains of sand, tiny sticks, hollow plant stems, or small snail shells. They glue these items into a protective tube using strong silk.
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