There's no ordering room service in these hotels. This month, the mayor of Seoul, South Korea made headlines by announcing plans to install "insect hotels" in the city's parks. No, the goal is not to provide better accommodations for bugs travelling to the city for business or pleasure; it is part of the mayor's pledge to improve Seoul's urban environment. As our lawns, gardens, and urban landscapes have become increasingly manicured, habitats for all types of wildlife, including many insects, have declined. Just as birdhouses are designed to give birds a safe home in an uncertain environment, insect hotels, sometimes called "wildlife stacks," provide shelter for insects in areas where human activity has removed the best hiding spots. Depending on your perspective on our six-legged friends, the phrase "insect hotel" may sound like either a joke or a nightmare. The structures—typically constructed from a variety of recycled materials such as pallet wood, twigs, bark, lichen...