Some insects (e.g. dragonflies) have aquatic larvae.

The caddis house is only a further extension of this kind of sequence.

There are baby birds on my lawn that are all alone.

Admittedly, {240} nobody has actually studied the genetics of caddis houses.

Obviously, my denuded caddis worms cannot start their work with bricks of this kind.

Sensitive to various pollutants, the different caddisfly species are good indicators of the health of a body of water.

I remove a number of caddis worms from their sheaths and submit these, as they are, to the test of water.

All you need is good reason to believe that the caddis house is a Darwinian adaptation.

But perhaps the most impressive caddis houses are the ones built in local stone.

Certain caddis worms, of the Sericostoma and Leptocerus species, clothe themselves in grains of sand and do not leave the bed of the stream.

Natural selection favoured those ancestral caddis genes that caused their possessors to build effective houses.

His initial research was concerned with insects: his studies on Phryganides, Perlides and Ephemera established his reputation.

I found it was quite necessary for the Caddises to have plenty of food whilst in the larva state, to enable them to have strength to undergo the transformation.

Other recent research found that half of the mayfly and caddisfly larvae in rivers in Wales contained microplastics.

I noticed that, after the Caddis-worms were turned out of their cases, air-bubbles appeared on the surface of their bodies.