The image parameter will not understand the image file if you put 'File:' in the beginning of it. For size and weight, use both the metric system and US customary units. For example, 3.5 inches (8.89 cm), or vice versa. For lizards, you should add the SV (Snout-to-Vent) suffix. This will make it easier for reptile hobbyists to determine a lizard's actual body size, as the tail can break off. For snakes this is not a problem, so you can use the TL (Total length, or STL, Snout-to-Tail-Length) suffix. For turtles this is SL (Shell Length).
With higher, more diverse taxa, you do not need to put in as many parameters. For example, species in the Iguania infraorder do not have one solid type of diet. Some are strictly herbivorous, some are carnivores, and some species are a little in between. If they are not all carnivores, herbivores or omnivores, you can omit the diet parameter. The same goes for other parameters.