Geckos


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Geckos

 

(Gekkonidae), a family of reptiles in the order of lizards. They normally have large eyes with vertical pupils, usually without movable eyelids. Only a few geckos are more than 30 cm long. The legs are always well developed. Most geckos have broadened toes with horny plates on the bottom. Microscopic hairs covering the plates and sharp claws enable geckos not only to hold onto vertical surfaces but even to run along them. With rare exceptions the tail is very brittle, but it is rapidly restored (regenerated). Most geckos are colored in gray or brown tones, but brightly colored geckos are also encountered among the tropical forest types.

Geckos are twilight and nocturnal animals. Most geckos hold onto trees, cliffs, banks, and similar vertical surfaces. Geckos that live in deserts usually dig holes in which they hide during the day. They eat insects, spiders, centipedes, and so on. Many geckos produce quiet noises. Almost all geckos are oviparous. Gecko eggs have a hard calcareous shell. There are one or two eggs to a clutch. During the season eggs are laid several times.

There are about 70 genera comprising some 480 species. Geckos are distributed in the tropical and subtropical zones and, to some extent, in the temperate zone. There are eight species of geckos in the USSR, primarily in Middle Asia and Kazakhstan. The scincoid gecko (Teratoscincus scincus) and the comb-toed gecko (Crossobamon eversmanni) are typical inhabitants of the sand deserts of Middle Asia. One species from the genus of bare-toed geckos, the gray bare-toed gecko (Gymnodactylus russowi), is also found in the Crimea and Transcaucasia. Gecko fossils have been found dating as far back as the Eocene period.

REFERENCES

Terent’ev, P. V. Gerpetologiia. Moscow, 1961.
Underwood, G. “On the Classification and Evolution of Geckos.” Proceedings of the Zoological Society of London, 1954, vol. 124, part 3, pp. 469-92.
References in periodicals archive ?
She was unpacking a box of potatoes in the kitchen when she saw something moving and uncovered a tiny baby gecko.
One ad came from a self-proclaimed World Health Organisation agent, who added that international pharmaceutical firms require geckos for cancer and Aids treatments.
The children also look after a female Kosch Day Gecko and a host of other creatures.
They are also accused of failing to provide proper housing, food and cleaning for a king snake, a leopard gecko, two spider geckos, two barking geckos, a Solomon Island ground boa, four corn snakes and five ridge-tailed monitors.
Geckoes generally inhabit the warmer areas of the country in the tropics and down as far as Melbourne where the marbled gecko (Christinus marmoratus) is becoming more widespread.
Analysis of DNA sequences indicates that New Zealand geckos are an ancient Gondwana group with a common ancestor that scuttled about on the old supercontinent before New Zealand split off,' Chambers says.
One hundred and twenty of the 200 geckos collected were identified as adults, using 44 mm SVL as a minimum size (Selcer 1986).
PHOENIX -- GEICO's traveling Gecko Exhibit will be coming to the Phoenix Zoo on Saturday, January 16 to raise awareness about wildlife conservation.
19 in the Interface Journal of the British Royal Society, Sitti and his team successfully emulated the contact self-cleaning ability of geckos in nature.
To examine a gecko's cling, Stark and colleagues put harnesses on six tokay geckos (Gekko gecko) and put them on four surfaces which varied in their wettability, or their degree of water resistance.
Based on this evidence, we hypothesized that, in general, Coleonyx with tails should have an advantage over tailless geckos in escaping from predators.