Mealworms, the larvae of the darkling beetle, are a popular feeder insect for a variety of reptiles, birds, and small mammals.
The ideal temperature range for mealworms is between 70-80°F (21-27°C). Temperatures above 85°F (29°C) can be harmful to mealworms, and temperatures below 60°F (15°C) can slow their growth and reproduction. We recommend keeping small mealworms at room temperature and large mealworms cooler if possible but do not refrigerate as this will kill your mealworms. A wine cooler at 55F works well. You can keep all sizes at room temperature. Note that large mealworms will pupate. These can be fed to your pet. Your pet can eat the beetles but they might not taste too good.
Mealworms require a source of water to stay hydrated. Just add a little water to your container. They are packed in food. It is a good idea to add vegetables that they can eat and are save for your pet. This will increase their nutritional value.