The gashyrr wasps were savage flying insects that lived in nests throughout the planet of Eldersthine. They had a worker caste which secreted a type of compound that lasted for years, making them slow, but astonishing workers.
The wasps were assimilated into the Zerg Swarm to serve as a resource gatherer, becoming drones. They lost their ability to fly in the process. The existence of the wasps and their history later became known to the Terran Dominion.