If those white spheres near your bed were actually lizard eggs, their appearance beside the head of your bed would not be random. Lizards often choose specific locations that provide safety, warmth, and protection for their eggs. Understanding why they might appear there can help explain both the behavior of the lizard and the environmental conditions inside your home.
First, it is important to understand that many house-dwelling lizards, especially geckos, commonly live indoors. They are attracted to homes because houses provide shelter from predators, stable temperatures, and a reliable food source in the form of insects. Once a female lizard is ready to lay eggs, she begins searching for a location that offers the best chance of survival for her offspring.
One reason a lizard might choose the area behind or beside a bed is warmth. Reptile eggs depend on environmental heat for development. Unlike mammals, reptiles do not incubate their eggs with body heat. Instead, they rely on surrounding temperatures. Areas near walls, furniture, and mattresses often remain slightly warmer than open floor spaces. A bed can trap heat from the people sleeping on it, creating a more stable temperature nearby. To a female lizard, this may appear to be a suitable place for egg development.
Another important factor is protection from disturbance. Lizards instinctively seek hidden places where predators are unlikely to find their eggs. The narrow space between a bed frame and a wall can provide exactly that kind of shelter. It is dark, enclosed, and often difficult for larger animals to reach. Since many people rarely inspect these hidden gaps, a lizard may view them as relatively safe nesting locations.
Darkness also plays a role. Lizards generally avoid laying eggs in bright, exposed areas. Direct sunlight can overheat eggs, while open spaces increase the risk of predation. The shaded area behind a bed remains dark for most of the day. This darkness may make the location seem ideal from the lizard’s perspective.
Humidity can be another contributing factor. Reptile eggs require a certain amount of moisture to develop properly. Excessively dry environments can cause eggs to lose water and fail to hatch. The area behind furniture sometimes traps a small amount of moisture and experiences less airflow than open parts of a room. This slightly more humid environment may help protect eggs from drying out.
A female lizard may also return to a location if it has been used successfully before. Some species exhibit what scientists call communal nesting behavior. This means multiple females may deposit eggs in the same protected location over time. If a hidden area behind a bed has previously served as a successful nesting site, future lizards may continue using it.
Food availability may indirectly contribute as well. Lizards often stay near places where insects are common. Bedrooms can attract insects drawn to lights, clothing, dust, or small food particles. If a female lizard already spends much of her time near the bedroom because prey is available, she may eventually choose a nesting site nearby.
