Uromastyx

Uromastyx
Uromastyx dispar
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Class:	Reptilia
Order:	Squamata
Suborder:	Iguania
Family:	Agamidae
Subfamily:	Uromasticinae
Genus:	Uromastyx Merrem, 1820
Species
See text

Uromastyx is a genus of African and Asian agamid lizards, the member species of which are commonly called spiny-tailed lizards, uromastyces, mastigures, or dabb lizards. Lizards in the genus Uromastyx are primarily herbivorous, but occasionally eat insects, especially young lizards. They spend most of their waking hours basking in the sun, hiding in underground chambers at daytime or when danger appears. They tend to establish themselves in hilly, rocky areas with good shelter and accessible vegetation.

Taxonomy

The generic name (Uromastyx) is derived from the Ancient Greek words ourá (οὐρά) meaning "tail" and mastix (μαστιξ) meaning "whip" or "scourge", after the thick-spiked tail characteristic of all Uromastyx species.

Species

The following species are in the genus Uromastyx. Three additional species were formerly placed in this genus, but have been moved to their own genus, Saara.

• Uromastyx acanthinura Bell, 1825 – Bell's dabb lizard
• Uromastyx aegyptia (Forskål, 1775) – Egyptian mastigure, Leptien's mastigure
• Uromastyx alfredschmidti Wilms & Böhme, 2001 – Schmidt's mastigure
• Uromastyx benti (Anderson, 1894) – Bent's mastigure
• Uromastyx dispar Heyden, 1827 – Sudan mastigure
  • Uromastyx (dispar) flavifasciata Mertens, 1962
  • Uromastyx (dispar) maliensis Joger & Lambert, 1996 – Mali uromastyx
• Uromastyx geyri (L. Müller, 1922) – Saharan spiny-tailed lizard
• Uromastyx macfadyeni Parker, 1932 – Macfadyen's mastigure
• Uromastyx occidentalis Mateo, Geniez, Lopez-Jurado & Bons, 1999 – giant spiny-tailed lizard
• Uromastyx ocellata Lichtenstein, 1823 – eyed dabb lizard
• Uromastyx ornata Heyden, 1827 – ornate mastigure
• Uromastyx princeps O’Shaughnessy, 1880 – princely mastigure
• Uromastyx thomasi Parker, 1930 – Oman spiny-tailed lizard
• Uromastyx yemenensis Wilms & Schmitz, 2007 – Yemen spiny-tailed lizard

Description

Their size ranges from (U. macfadyeni) to 91 cm (36 in) or more (U. aegyptia). Hatchlings or neonates are usually no more than in length. Like many reptiles, these lizards' colors change according to the temperature; during cool weather they appear dull and dark but the colors become lighter in warm weather, especially when basking; the darker pigmentation allows their skin to absorb sunlight more effectively.

Their spiked tail is muscular and heavy, and can be swung at an attacker with great velocity, usually accompanied by hissing and an open-mouthed display of (small) teeth. Uromastyxs generally sleep in their burrows with their tails closest to the opening, in order to thwart intruders.

Distribution

File:Mali uromastyx.jpg

Mali uromastyx, female

Uromastyx inhabit a range stretching through most of North and Northeast Africa, the Middle East, ranging as far east as Iran. Species found further east are now placed in the genus Saara. Uromastyx occur at elevations from sea level to well over . They are regularly eaten, and sold in produce markets, by local peoples. Uromastyx tend to bask in areas with surface temperatures of over .

Reproduction

A female Uromastyx can lay anywhere from 5 to 40 eggs, depending on age and species. Eggs are laid approximately 30 days following copulation with an incubation time of 70–80 days. The neonates weigh 4–6 g (0.14–0.21 oz) and are about snout to vent length. They rapidly gain weight during the first few weeks following hatching.

A field study in Algeria concluded that Moroccan spiny-tailed lizards add approximately of total growth each year until around the age of 8–9 years.

Wild female uromastyx are smaller and less colorful than males. For example, U. (dispar) maliensis females are often light tan with black dorsal spots, while males are mostly bright yellow with mottled black markings. Females also tend to have shorter claws. In captivity female U. (dispar) maliensis tend to mimic males in color. Maliensis are, therefore, reputably difficult to breed in captivity.

Diet

These lizards acquire most of the water they need from the vegetation they ingest. Giving a Uromastyx a water bowl can lead to higher humidity in the cage and can cause problems for the animal.

Consumption by humans

The Arab people of the Najd region of Saudi Arabia have different cuisine than the Arabs of other parts of the peninsula like Hejaz. The Uromastyx maliensis lizard, known as "dabb" (ضَبّ) by Najdis, is consumed as food by the Arabs of the Najd region of Saudi Arabia, like the Bedouin. This monitor lizard is considered a "bedouin delicacy". The Prophet Muhammad was from Hejaz. A Sahih Hadith recorded that when a Najdi lizard was brought to Prophet Muhammad by Hufaida bint al-Harith, Muhammad did not eat the lizard but he did not forbid other Muslims from eating it so Muhammad's companion Khalid bin Walid ate the lizard. Dried lizard tonic was monopolized by the Hashemites before the Saudi family seized Medina and Mecca from them.

The Sahih Muslim Hadith on lizard says - 'Abdullah b. 'Abbas reported that Khalid b. Walid who is called the Sword of Allah had informed him that he visited Maimuna, the wife of Allah's Apostle (ﷺ), in the company of Allah's Messenger (ﷺ), and she was the sister of his mother (that of Khalid) and that of 'Ibn Abbas, and he found with her a roasted lizard which her sister Hufaida the daughter of al-Harith had brought from Najd, and she presented that lizard to Allah's Messenger (ﷺ). It was rare that some food was presented to the Prophet (ﷺ) and it was not mentioned or named. While Allah's Messenger (ﷺ) was about to stretch forth his hand towards the lizard, a woman from amongst the women present there informed the Messenger of Allah (ﷺ) what they had presented to him. They said: Messenger of Allah, it is a lizard. Allah's Messenger (ﷺ) withdrew his hand, whereupon Khalid b. Walid said: Messenger of Allah, is a lizard forbidden? There opon he said: No, but it is not found in the land of my people, and I feel that I have no liking for it. Khalid said: I then chewed and ate it, and Allah's Messenger (ﷺ) was looking at me and he did not forbid (me to eat it). (وَحَدَّثَنِي أَبُو الطَّاهِرِ، وَحَرْمَلَةُ، جَمِيعًا عَنِ ابْنِ وَهْبٍ، قَالَ حَرْمَلَةُ أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي أُمَامَةَ بْنِ سَهْلِ بْنِ حُنَيْفٍ الأَنْصَارِيِّ، أَنَّ عَبْدَ اللَّهِ، بْنَ عَبَّاسٍ أَخْبَرَهُ أَنَّ خَالِدَ بْنَ الْوَلِيدِ الَّذِي يُقَالُ لَهُ سَيْفُ اللَّهِ أَخْبَرَهُ أَنَّهُ، دَخَلَ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم عَلَى مَيْمُونَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم وَهِيَ خَالَتُهُ وَخَالَةُ ابْنِ عَبَّاسٍ فَوَجَدَ عِنْدَهَا ضَبًّا مَحْنُوذًا قَدِمَتْ بِهِ أُخْتُهَا حُفَيْدَةُ بِنْتُ الْحَارِثِ مِنْ نَجْدٍ فَقَدَّمَتِ الضَّبَّ لِرَسُولِ اللَّهِ صلى الله عليه وسلم وَكَانَ قَلَّمَا يُقَدَّمُ إِلَيْهِ طَعَامٌ حَتَّى يُحَدَّثَ بِهِ وَيُسَمَّى لَهُ فَأَهْوَى رَسُولُ اللَّهِ صلى الله عليه وسلم يَدَهُ إِلَى الضَّبِّ فَقَالَتِ امْرَأَةٌ مِنَ النِّسْوَةِ الْحُضُورِ أَخْبِرْنَ رَسُولَ اللَّهِ صلى الله عليه وسلم بِمَا قَدَّمْتُنَّ لَهُ . قُلْنَ هُوَ الضَّبُّ يَا رَسُولَ اللَّهِ . فَرَفَعَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَدَهُ فَقَالَ خَالِدُ بْنُ الْوَلِيدِ أَحَرَامٌ الضَّبُّ يَا رَسُولَ اللَّهِ قَالَ " لاَ وَلَكِنَّهُ لَمْ يَكُنْ بِأَرْضِ قَوْمِي فَأَجِدُنِي أَعَافُهُ " . قَالَ خَالِدٌ فَاجْتَرَرْتُهُ فَأَكَلْتُهُ وَرَسُولُ اللَّهِ صلى الله عليه وسلم يَنْظُرُ فَلَمْ يَنْهَنِي .)

One stereotype Persians have of Arabs is that they eat lizards. Persians use the slur "soosmar-khor" (سوسمار خور) (lizard eater) against Arabs and the Sunni Muslim Persian poet Ferdowsi included a derogatory insulting verse against Arabs in his Shahnameh poem (زشیر شتر خوردن و سوسمار عرب را به جایی رسیده ست کار که فر کیانی کند آرزو تفو بر تو ای چرخ گردون تفو) (zasheer shatar khordan va soosmar) which is translated into Arabic as (مِن شُرب لبن الابل وأكل الضب بلغ العرب مبلغاً أن يطمحوا في تاج الملك؟ فتباً لك أيها الزمان وسحقا) or (ثم قال: أعلمنى بما أنت عليه من دينك، و رسمك و آيينك. و أخبرنى مَن سلطانك و بمن اعتضادك و اعتصامك. فقد جئت فى عساكر حفاة عراة بلا ثقل و لا رحل و لا فيل و لا تخت. ثم بلغ بكم الأمر من شربكم ألبان الإبل و أكلكم أضباب القيعان إلى تمنى أسرّة الملوك العجم أرباب التخوت و التيجان.), with the verse attributed to the Persian commander Rostam Farrokhzād as insulting the Arabs as camel milk drinkers and lizard eaters during the Muslim conquest of Persia. Some historians believed another Persian in the Medieval ages inserted the line about lizards and camels milk and that Ferdowsi did not write it. Richard F. Burton translated the line as "Hath the Arabs daring performed such feat, Fed on camel’s milk and the lizard's meat, That he cast on Kayánian crown his eye? Fie, O whirling world! on thy faith and fie!"

Captivity

Egyptian spiny-tailed lizard (Uromastyx aegyptia)

Historically, captive Uromastyx had a poor survival rate, due to a lack of understanding of their dietary and environmental needs. In recent years, knowledge has significantly increased, and appropriate diet and care has led to survival rates and longevity approaching and perhaps surpassing those in the wild.

The Mali Uromastyx (Uromastyx (dispar) maliensis) is considered an ideal species to choose as a pet because they readily adapt to a captive environment. Another species of Uromastyx that adapts to captivity well, and comes in "red" and "yellow", is Uromastyx geyri, commonly called the Saharan Uromastyx. The red version is marketed as a red Niger Uromastyx but the yellow version is marketed as a yellow Niger Uromastyx. Artificial UVB/UVA light and vitamin supplements must be balanced with proper food and nutrition, UVB light is required for calcium absorption from the gut. Most commercially available UVB lights lose efficiency after 6 months and need to be replaced. Proper enclosures can be costly, as these are roaming animals with large space needs for their size, combined with the need to provide heat and ultraviolet light. Though the lizards bask at very high temperatures, there must be a temperature gradient within the enclosure allowing them to cool off away from the heat lamps. A cooling-down period over winter months can trigger the breeding response when temperatures rise in the spring. The temporary slowing-down of their metabolisms also lengthens the animals' lifespans.

Uromastyx are removed from the wild in an unregulated manner for the pet and medicinal trade in Morocco, despite their protected status in the country. Conditions of the animals while being sold is often extremely poor and overcrowding is common.

Uromastyx are burrowing lizards, and need substrate deep enough to burrow in, or a low structure under which to hide. In the wild, these lizards' burrows can reach in length.

Nutrition

Captive uromastyxs’ diets should be largely herbivorous, consisting primarily of endive, dandelion greens, bok choy, escarole, and most ground growing vegetables with little to no sugar, or of course an appropriate type of store-bought vegetarian lizard food. Some lettuces have almost no nutritive value. The lighter, whiter lettuce is not as nutritionally effective as the darker green lettuce. It is very important to avoid spinach, chard and flowering kale in the diets of all reptiles, since the oxalates in spinach prevent the uptake of calcium into the bloodstream. However, a special UVB bulb must be used in order for them to absorb the calcium from the gut. They can consume de-thorned cacti with their powerful jaws, especially if they need water. The lizards' food can be dusted with a calcium and a uromastyx designed supplement to help prevent health problems. While young uromastix, like young iguanas, do eat some insects in order to gain access to the added nutrients while they are rapidly growing, the high levels of protein may cause liver damage in adults. These animals are primarily herbivores, as stated above, and so it's generally felt that they should only be fed plant matter. In the wild, adult Malis have been reported to eat insects at certain times of the year, when it is hot and their only food source available would be insects.

External links

• Media related to at Wikimedia Commons
• Data related to Uromastyx at Wikispecies
• Information on some Uromastyx species
• A digital library source from the University of Texas at Austin
• Detailed Uromastyx Care Sheet
• Uromastyx.eu
• Dr. Doug Dix Uromastyx Page
• The UroWiki