In hot countries, silverfish and firebrat live outside. In Canada, they find shelter indoors, because the weather is cooler. These insects have a long body, are covered with scales and have antennas. Silverfish antennae are silver, while those of firebrats are more beige. They like to stay in damp places such as basements, bathrooms and buildings where there are water leaks. Silverfish prefer cooler places, while the firebrat prefers heat.