The brightly colored red ladybugs with black spots are nice to look at and some say they bring good luck, but in the Fall, they can end up in your commercial building looking for a place to hibernate. They have probably been hibernating near the building and the warmer temperatures have caused them to emerge - it is just that they are going in the wrong direction. You would think that they would be trying to get out of the building, but they are coming in. This happens because of the variation in temperatures from the interior of the building versus the outside temperatures. The ladybugs are just confused.

The ladybugs are not poisonous to humans, but can have toxic effects on some animals. The ladybugs are attracted to the light colored buildings and especially to offices with a southwestern sun exposure. Older buildings tend to experience more problem with aggregations due to lack of adequate insulation. The ladybugs come in through small cracks around windows and doorways. They want to hibernate in a warm, comfortable spot over the cold months of winter. Ladybugs gather in groups when they hibernate, so if you see one, you can be sure more will follow. The best way to keep them out is to repair damaged windows and door trim and caulk small cracks. 

Once the ladybugs are in your house, they will not eat fabric, plants, paper or any other household items. They like to eat aphids. Aphids are very small, but very destructive pest that feeds on plants. They also prefer a little humidity, but most of the offices are usually not very humid during the winter. In fact, they are rather dry causing most of your ladybug guests to die from dehydration. Occasionally, you might witness a ladybug in your kitchen, break area, or bathroom getting a drink of water.

If you do not have a lot of them, just leave them. They will leave when spring arrives. Disturbing them will only cause them to stress out leaving yellow markings on your walls. The yellow stuff, you see, is not waste matter, but rather, their blood. The ladybugs release a small amount of their blood which is yellow and smells, when they sense danger.
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