Finding a small lizard darting across a wall is a common occurrence in many homes. These visitors, often geckos, prompt questions about their indoor survival. This article explores how geckos live within human households, detailing the species typically found and the factors influencing their survival.
Gecko Species Commonly Found Indoors
Two species are commonly found indoors globally: the Common House Gecko (Hemidactylus frenatus) and the Mediterranean House Gecko (Hemidactylus turcicus). The Common House Gecko, also known as the Asian house gecko, originates from South and Southeast Asia and is often seen on walls and buildings. It measures 7.5 to 15 cm (3 to 6 inches) including its tail.
The Mediterranean House Gecko, or Turkish gecko, is native to the Mediterranean region and has also spread globally. It is slightly smaller, typically 10 to 13 cm (4 to 5 inches) long. Both species are nocturnal, hunting insects attracted to lights at night. They are drawn indoors by insects, warmth, and shelter.
Key Factors for Indoor Gecko Survival
Gecko survival indoors depends on environmental and resource factors. Food availability is crucial; geckos are insectivores. They prey on common household pests like cockroaches, termites, moths, flies, spiders, and beetles, which can serve as a consistent food source.
Water access is also necessary for their hydration. Geckos may obtain water from condensation on surfaces, leaky pipes, or pet water bowls. Temperature and humidity levels within a home are also important. Common house geckos prefer warm, humid environments, with temperatures ranging from 24-32°C (75-90°F) during the day, and 18-24°C (65-75°F) at night. Mediterranean house geckos prefer 60-80% average humidity, fluctuating from 30% to 90%.
Geckos also require shelter and hiding spots for safety and rest during daylight hours. They use crevices, wall cracks, and undisturbed areas behind furniture. Absence of threats also impacts survival. Exposure to pesticides, harsh household cleaners, or predation from pets like cats can reduce their survival.
Expected Lifespan of Geckos Indoors
The lifespan of geckos indoors varies based on how well their survival needs are met. In natural or ideal captive conditions, Common House Geckos live 5 to 7 years. Mediterranean House Geckos typically live 3 to 5 years in the wild, but up to 8 or 9 years in captivity.
Indoor survival often shortens these lifespans. While some geckos may survive for months or over a year if food, water, and shelter are consistent, many last only a few weeks. Factors like insect availability, water access, stable temperatures, and absence of threats (chemicals, pets) directly influence how long a gecko persists. Without these resources, their indoor lifespan is often reduced.
Ecological Role of Geckos in Homes
Geckos in homes are insect predators. Their diet consists of common household insects like mosquitoes, flies, cockroaches, and spiders, making them natural pest controllers. By consuming these insects, geckos help reduce pest populations.
These small reptiles are harmless to humans and property. They are not venomous and do not pose a poisoning threat. While they can leave droppings that may stain surfaces, their beneficial role in insect control often outweighs minor inconveniences.
Guidance for Homeowners
Homeowners finding a gecko indoors have options. Many choose to observe them, given their beneficial role in pest control and harmless nature. If intervention is desired, humane removal is possible.
For safe removal, gently coax the gecko into a cup, then slide paper underneath to trap it. Release the gecko outdoors in a sheltered area away from the house. To prevent future entry, seal cracks around windows and doors, and ensure screens are intact. Reducing outdoor lighting near entry points can also help, as lights attract insects that draw geckos.