Last week the question was: What is this?
This is a mud dauber nest. Mud daubers are wasps that make nests out of soil. There are several species that construct nests in a variety of shapes. This particular one is a pipe organ mud dauber. The adult female builds the nest which contains multiple sealed chambers packed full of spiders that have been stung and paralyzed. An egg is also laid in each chamber. Once the egg hatches, the larva feeds on the spiders as it develops. When mature, the wasp exits the nest by boring a hole through the mud.
Here is this week’s question: What is this insect?