A sharp-eyed dog-walker of my acquaintance (I'm married to her) spotted something a little unusual near the bottom of a utility pole a couple blocks from our place. Bees were flying in and out of a cavity about three and a half feet above the sidewalk. A honeycomb was visible. They had a full-fledged if rather small hive going, right out in plain sight. My acquaintance took my out to the scene so I could document the scene. (Click the images for larger views of the pictures.)
An unaddressed question: Does this little insect colony pose a danger? The pictures show evidence of boring, probably by powder-post beetles. Is the pole going to snap off? Except for this one area, it appears pretty solid. (The question brings up some interesting issues, such as who's responsible for fixing or replacing a damaged pole. A friend who works for the city and is generally pretty well informed tells me that the last utility that attached something to the pole generally bears responsibility.