Insects
From UroWiki
Feeding insects
This is a tricky issue in uromastyx husbandry. Although many caresheets indicate the feeding of crickets and mealworms, particularly to young uromastyx for additional protein intake, it is the considered opinion of experienced uromastyx owners that these are not good food items and that the uromastyx should be treated as a strict herbivore. An uromastyx' digestive track is geared towards the vegetables in its diet and may not be able to sufficiently digest the high protien levels present when eating insects. Tough carapaces also present a risk of impaction and internal bleeding.
Consumption of insects in the wild
Although a topic of hot debate among uromastyx keepers and breeders, there seems to be a mounting body of evidence to suggest that uromastyx do not, in fact, eat many insects in the wild. Troy Jones has corresponded with Danny Molco, co-author of Ornate Spiny-tail Lizards and Study of wild populations of Uromastyx along with Ben David Osnat, and has been kind enough to share the details of his correspondence with the UroWiki. These can be viewed on the UroWiki forums:
