Last updated 2026.09.16 · Edited by silveston · Compiled by an independent hobbyist without professional credentials
The mourning gecko is more than just a “small gecko that reproduces without males”; it is a unique vertebrate species in which distinct clones compete and communicate, having expanded across the globe by following human migration networks.
This document focuses on classification, ecology, behavior, evolution, and conservation in the wild. Please refer to a separate care guide for specific details regarding temperature, humidity, and feeding guidelines.
At a glance
| Korean name | Mourning gecko |
|---|---|
| English name | Mourning gecko |
| Scientific name | Lepidodactylus lugubris |
| Taxonomic scope | Species |
| Class | Reptilia (or Sauropsida in a phylogenetic context) |
| Order | Squamata |
| Family | Gekkonidae (Gecko family) |
| Genus | Lepidodactylus |
| Natural Distribution | Originated in the tropical Indo-Pacific region and spread to various parts of the world following human migration |
| Primary Habitat | Warm vertical spaces such as coastal forests, tree trunks, and crevices in rocks or buildings |
| Activity Period | Active primarily at night within small colonies |
| Wild Diet | Small arthropods, nectar, and soft plant matter |
| Reproduction | Lays eggs via a parthenogenetic lineage composed mostly of females |
| Conservation Note | A widely introduced species; its impact on local ecosystems must be assessed on a location-by-location basis |
Taxonomy and Naming
While there are various theories regarding the origin of the name “mourning gecko,” the species’ defining biological characteristic is that most populations consist of parthenogenetic lineages made up of females.
A species complex formed through parthenogenesis
Most individuals are female and lay eggs where embryos develop without fertilization; however, not every individual is an identical clone of the others. As multiple clonal lineages with distinct origins and chromosomal compositions exist—and males appear on very rare occasions—the mourning gecko possesses an evolutionary history more complex than that of a simple “clone.”
Dispersal linking islands and ports
Their small bodies, adhesive eggs, and habit of utilizing crevices in buildings facilitated their dispersal via cargo and ships. Introduced populations have now been identified not only on islands across the Indo-Pacific but also in Central and South America and various tropical regions. The fact that reproduction can begin with the arrival of just a single female significantly increases the likelihood of establishing a population in a new area.
A Small Body Suited for Vertical Living
They use microscopic adhesive structures on their toes to climb tree bark, leaves, and building walls. During the day, they hide in narrow crevices, while at night, they forage for small insects or floral resources that gather around light sources. Although their small size increases the risk of predation, it also allows them to use slender crevices—inaccessible to most other animals—as hiding spots.
Social Differences Among Clones
Even among genetically similar individuals, behaviors such as approaching food, chasing, arching the body, vocalizing, and biting can vary. Studies have observed differences in food-competition behaviors between distinct clones. This demonstrates that genetic background and social experience interact to shape behavior, revealing that populations reproducing via parthenogenesis are not merely collections of identical individuals.
Communication and Pseudocopulation
They regulate the distance between individuals through short vocalizations, gestures, scent, and physical contact. Females sometimes engage in behaviors resembling mating, and research has explored the potential link between these social interactions and their egg-laying cycles. The absence of a need for males in reproduction does not mean that social behaviors disappear.
Adhesive eggs and rapid population expansion
They lay hard-shelled eggs glued into crevices or onto structures, making them difficult to relocate. Although the number of eggs laid at one time is small, the combination of repeated laying and parthenogenesis allows the population to grow rapidly. Research indicates high reproductive efficiency, with a single female laying multiple clutches consecutively over an extended period.
The impact of a successful invasive species
In new regions, the mourning gecko may compete with native small geckos for food and shelter or facilitate the spread of pathogens. As the extent of the impact varies by ecosystem, one should avoid categorically labeling them as harmful or assuming they have no impact at all. The key lies in preventing the escape of captive individuals and accumulating region-specific monitoring data.
Three steps to understanding parthenogenesis
Fertilization, egg-laying, and genetic variation among offspring are distinct concepts. The mourning gecko is an animal that reproduces via parthenogenesis (without fertilization) and is oviparous (lays eggs). It should not be confused with viviparous species that give birth to live young.
| Questions | Insights from the mourning gecko |
|---|---|
| Does reproduction stop if there are no males? | Since females can lay eggs on their own, it is necessary to record both the population count and the location of the eggs. |
| Are all individuals identical clones? | Since multiple clonal lineages exist, we distinguish between the diversity of the species as a whole and the similarity within a single lineage. |
| Does high reproductive capacity guarantee establishment anywhere? | Reproductive method alone does not guarantee establishment; factors such as introduction pathways, food sources, climate, and competition also play a role. |
Explanation of clonal lineages and island dispersal covers the ecological significance of reproduction, Guide to preventing escapes and managing eggs explains how to handle these issues in captivity.
Captive Populations, Morphs, and Selective Breeding
Parthenogenesis allows a population to grow from just one or a few individuals. While this trait is fascinating for research and captive breeding, it also poses a high risk of establishing an invasive population if they escape.
Key Ecological Points
- A population can be established even if only a single female arrives in a new area.
- Because multiple clonal lineages exist, not all individuals are genetically identical.
- Even when reproducing without males, females exhibit behaviors such as pseudocopulation and dominance hierarchies.
- The habit of attaching eggs to structures, combined with the movement of cargo, has facilitated their global spread.
Frequently Asked Questions
Do they reproduce without males?
Most populations reproduce through female-only parthenogenesis.
Are all individuals genetically identical?
Since multiple clonal lineages exist, not all individuals worldwide share the same genotype.
Why are they found in various regions across the globe?
They have spread to many tropical and subtropical regions due to their small size, their eggs, and transport by humans.
Are they not social animals?
No, they are. Interactions involving sound and behavior have been observed within small groups.
References
- The Reptile Database — Lepidodactylus lugubris
- Behavioral interactions for food among two clones
- Pseudosexual and dominance behaviour
- Charles Darwin Foundation species database
Data review date: August 2026. Classification and conservation status are subject to change based on new research and assessments.
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