Why might Oriental cockroaches be found in bathtubs?

Oriental cockroaches are known to have difficulty climbing smooth, vertical surfaces due to their physical characteristics. These cockroaches lack the sticky pads on their feet that many other cockroach species possess, which enable them to navigate slick surfaces with ease. As a result, when they find themselves in a bathtub — a smooth, slippery environment — they may struggle to escape. This physical limitation is a key reason they can often be found in such locations, as they may inadvertently fall in and then be unable to climb out.

While elements like water attraction or food availability may seem relevant, the primary factor here is related to their inability to scale surfaces effectively due to their anatomical traits. This lack of climbing ability contributes significantly to their presence in bathtubs, making it a critical aspect of understanding their behavior and habitat preferences.