Author: Jan Scholten
English: Ice-crawlers; Ice crawlers; Icebugs.
Habitat: top of mountains and the edges of glaciers.
Grylloblattidae are extremophile, psychrophile, wingless insects. They are tiny, most being less than 3 cm long. They have a head resembling that of a cockroach, with long antennae and having elongated cerci arising from the tip of their abdomen. They cannot tolerate warmth, most species will die at 10 °C. Many species have small distribution ranges.