Silkworms can survive (live) temperatures between 20-30°C (68-86°F), but they grow best at 25°C (77°F)!
Insects And Bugs - Facts for Kids

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Random Facts About Insects And Bugs For Kids
Butterflies often hide under large leaves during rainstorms to avoid getting their wings wet!
Some firefly species have learned to recognize and copy the flash patterns of other species!
Spider eggs usually hatch within 2–3 weeks, but some species’ eggs can survive through the winter and hatch in spring!
Hornets have five eyes – two large compound eyes and three small simple eyes called ocelli!