Reader Frederick Thurber found this mass of tough, fibrous material stuck firmly between two logs in his woodpile. What is this?
Answer
These are bee moth cocoons, which we identified with help from Charley Eiseman, author of Tracks & Sign of Insects & Other Invertebrates. In the book, Eiseman notes that the larvae of this non-native species (Aphomia sociella) “live gregariously in nests of bees and social wasps, feeding on nest materials, stored food, and waste products. They have also been found in mouse nests, bird nests, and human dwellings. When mature, they form soft but extremely tough, elongate cocoons in a densely packed mass.”
For readers interested in learning more about these and other invertebrates, we recommend a visit to Eiseman’s website.
This week’s contest winner was Donna Beaudin