What are Lizards?
Lizards are a widespread group of squamate reptiles, with approximately over 6,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. Lizards are the most speciose among extant reptiles, comprising about 60% of all living species. The adult length of species ranges from a few centimeters for chameleons such as Brookesia micra and geckos such as Sphaerodactylus ariasae to nearly 3 m (9.8 ft) in the case of the largest living varanid lizard, the Komodo dragon.
Most lizard species are harmless to humans. Only the largest lizard species, the Komodo dragon, which reaches 3.3 m (11 ft) in length and weighs up to 166 kg (365 lb), has been known to stalk, attack, and, on occasion, kill humans. Lizards that bite humans are very rare. Lizards are predominantly insectivorous, but some eat fruit, or vegetables. Live crickets and worms are the most typical foods for pet lizards, though the crested gecko (not a friendly lizard to humans) can feed entirely on fruit.
Prevention of Lizards
To prevent lizards from entering the home, seal all small openings 1/4 inch and larger. Check areas such as corners of doors and windows, around water pipes, electrical service entrances, ventilation screens, water pipes, etc. Threshold sweeps and tight-fitting door seals with no gaps at the edges are important prevention measures. Unlike rats and mice, lizards cannot gnaw through wood or other common building materials. A number of materials can be used to seal access points, including insulating foam, caulking, flashing, and steel wool.
Good sanitation can be helpful in reducing the number of lizards around a home, although it alone will not eliminate their presence. Off-the-ground storage of lumber, crates, boxes, sacks, gardening equipment, and other household items will make an area less suitable for lizards by reducing their hiding spots.