“Artificial lighting at night changes the balance between species. When we increase the amount of light in a nighttime environment, the behavior of individual species changes. Some animals hide when there is more light because they are prey, and they normally come out to feed only in darkness. When darkness disappears, these species suffer an evolutionary disadvantage and may even face extinction.”
What Should You Do If You Find a Gecko Indoors?
The answer is simple: nothing.
Geckos sometimes enter homes because they have wandered inside by mistake or because they are looking for food. There is no need to worry—they will usually leave on their own. Simply leave a window slightly open during the day, and the gecko will most likely find its way back outside.
Characteristics of Geckos
Geckos are reptiles belonging to the suborder Sauria and the family Gekkonidae. They naturally inhabit Mediterranean regions, particularly coastal areas with warm, temperate climates.
Their most remarkable feature—and perhaps the one that surprises people the most—is their ability to climb walls, ceilings, and other vertical surfaces. They can even move upside down without using any sticky secretions. The secret lies in their feet.
Each foot is covered with millions of microscopic hair-like structures. These create weak electrostatic attractions known as Van der Waals forces. Every toe pad contains millions of these tiny hairs, which conform to the microscopic irregularities of a surface when slight pressure is applied. The combined effect of millions of these interactions allows geckos to cling to walls and ceilings as if they had suction cups.
This extraordinary natural adaptation has fascinated scientists and engineers for decades, including researchers at NASA, who have sought to replicate it for a variety of technological applications.
Geckos are generally small, rarely exceeding 15–16 centimeters (6 inches) in length, including the tail. They are shy and harmless animals. Humans are not of interest to them, and if you approach one, it will almost certainly run away. However, if a gecko is handled roughly or feels threatened, it may bite in self-defense. Its bite is not venomous and is generally harmless.
Why Geckos Are Beneficial
Beyond being fascinating creatures, geckos are extremely useful. Imagine a warm summer day invaded by unwelcome visitors such as mosquitoes, flies, spiders, stink bugs, or cockroaches. Whether because of fear, allergies, or simple annoyance, people often want to get rid of these pests.
A gecko, however, would happily feast on them. In this sense, protecting geckos also means protecting ourselves. By learning to live alongside these small reptiles, we can reduce unnecessary insect killing, rely less on chemical pesticides, and help maintain the natural balance of the ecosystem.
