chromosomes and one with 46 chromosomes. This could be explained through an intraspecific variation of karyotype, or the possibility of two distinct species being misidentified. Morphological analysis seems particularly congruent with the suggestion that they indeed are different species. Taxonomic revision may be required as a greater understanding of phylogenetic trees and population structures is developed. House geckos in captivity House geckos can be kept as pets in a vivarium with a clean substrate, and typically require a heat source and a place to hide in order to regulate their body temperature, and a system of humidifiers and plants to provide them with moisture. The species will cling to vertical or even inverted surfaces when at rest. In a terrarium they will mostly be at rest on the sides or on the top cover rather than placing themselves on plants, decorations or on the substrate, thus being rather conspicuous. Cultural beliefs In Southeast Asia, geckos are believed to be carriers of good omen. In the Philippines, geckos making a ticking sound are believed to indicate an imminent arrival of a visitor or a letter. But in Thailand, if a common house gecko chirps when someone leaves the house, that's a bad omen. In Thai idioms, it is called "greeting gecko". An elaborate system of predicting good and bad omens based on the sounds made by geckos, their movement and the rare instances when geckos fall from roofs has evolved over centuries in India. In some parts of India, the sound made by geckos is considered a bad omen; while in parts of India, Assam, West Bengal, Bangladesh and Nepal, it is considered to be an endorsement of the truthfulness of a statement made just before, because the sound "tik tik tik" resembles the expression "thik thik thik" (Assamese: ঠিক ঠিক ঠিক), which in many Indian languages (e.g. Bengali and Assamese) means "correct correct correct", i.e., a three-fold confirmation. The cry of a gecko from an east wall as one is about to embark on a journey is considered auspicious, but a cry from any other wall is supposed to be inauspicious. A gecko falling on someone's right shoulder is considered good omen, but a bad omen if it falls on the left shoulder. In Punjab, it is believed that contact with the urine of a gecko will cause leprosy. In some places in India, it is believed that watching a