A few springs ago, we noticed flickers using a hole in a similar kind of facade molding near the roof of a restaurant building in downtown Boulder. In that situation, based on the fairly rough appearance of the hole opening and a location that would not be in the right spot to be any kind of drain, it seemed like the flickers had excavated it themselves and from our subsequent observations they appeared to nest there. The molding seemed to be of a fairly soft plaster/stucco-like material that likely allowed them to excavate it. The building maintenance did not patch the whole for at least another year, but there was no sign of nesting in the hole that we observed the following spring.
-- John Malenich
Boulder, CO
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