Chamaeleo namaquensis is one of the largest chameleon species in southern Africa, and reaches up to 25 cm in length. Its tail is far shorter than its body and than those of other arboreal species of chameleon. This is an adaptation to its primarily terrestrial habitat. It has large dorsal spines and a prominent, pointed casque on the back of its head, however it lacks the neck flap of other Chamaeleo species. Although capable of changing colour, this chameleon is usually some shade of grey or brown with several lighter patches on the flank, dark patches below the dorsal ridge and yellow or red striping on the throat.
This chameleon species occurs naturally throughout the arid western part of southern Africa, and is particularly common in the Namib Desert. It is recorded as far south as Sutherland, in the Western Cape, South Africa, and as far north as southern Angola. In the furthest eastern edge of its range, in eastern Namibia, it overlaps with the natural range of its relative, the flap-necked chameleon.
The Namaqua chameleon has evolved several adaptations to cope with desert conditions: they excrete salt from nasal glands to conserve water, and dig holes to aid in thermoregulation. They also use their ability to change colour to aid in controlling temperature, becoming black in the cooler morning to absorb heat more efficiently, then a lighter grey color to reflect light during the heat of the day — or showing both colours at the same time, neatly separated left from right by the spine.
Unlike the arboreal chameleons of the genus Chamaeleo, its tail is not prehensile, but otherwise it still hunts in the same way, slowly stalking its prey and catching it with its long tongue. Namaqua chameleons feed on insects, (particularly beetles and crickets); lizards, including young chameleons of their own species; small snakes; and even scorpions. They hunt their prey in both sandy dunes and rocky areas.
In turn, Namaqua chameleons are preyed upon by jackals, hawks, and eagles. Similar to other chameleon species, in areas near human habitation, it falls victim to introduced predators such as domestic cats and dogs.
Adult females lay up to three clutches of eggs a year, each numbering up to about twenty eggs, burying them in the sand. These take about one hundred days to hatch, and the young chameleons are able to reproduce at about six months of age.
Namaqua chameleons are listed as CITES II. In 2012, the filming of the Mad Max sequel Fury Road caused significant damage to Namaqua chameleon habitat in Dorob National Park and Namib-Naukluft National Park.
- Carpenter, A.I. (2013). "Chamaeleo namaquensis". IUCN Red List of Threatened Species. Version 2014.3. International Union for Conservation of Nature. Retrieved 2015-01-20.
- Branch, B. (1988). A Field Guide to the Snakes and other Reptiles of Southern Africa. ISBN 0-86977-641-X.
- "Descriptions and articles about the Namaqua Chameleon (Chamaeleo namaquensis) - Encyclopedia of Life". Encyclopedia of Life.
- "Namaqua chameleon". ARKive. Retrieved 2015-01-19.
- Krystal A. Tolley; Michele Menegon (2013-04-11). "Mad Max sequel runs over sensitive desert ecosystem in Namibia". Mongabay.com. Retrieved 2015-01-19.