The bed of a stream

Marguerite IckisNature in Recreation, New York, A.S. Barnes and Company, 1943, p. 69.

Follow the bed of a stream to see if you can find a Cadis Fly and observe it build a house of stone. It is esay enought to find a hornet’s nest and make a  study of a house built of paper. The Wasp lives in a house made of mud…