A small moth-like insect with an aquatic larva that typically builds a protective portable case of sticks, stones, and other particles.
- ‘The children's trays began to fill with mayfly nymphs, aquatic sow bugs, and the larvae of blackflies, caddis flies, and bloodred midges.’
- ‘Once you've collected a hundred or so caddises then you've got enough to go fishing with - and you can often get ten caddis grubs off a single stone.’
- ‘Every day the sun sets behind blurred clouds of stonefly, caddis, midge or mayfly dancing against the horizon.’
- ‘The key to the transformation is that the oxygen has increased the number of invertebrate the fish feed on from about five to 30 including freshwater shrimp, water louse and a caddis which only thrives in pristine waters.’
- ‘It included specimens of fourteen insect orders, with major holdings of New Zealand moths, butterflies, beetles, stoners, caddis and bugs.’
Mid 17th century: of unknown origin.