Ithorian SkyYards Tree Grove-class herd ship

According to Wookieepedia, Ithorian Herdships were "spacecraft designed by the Ithorians at the Ithorian SkyYards to transport all manner of items across the galaxy, providing the Ithorians a home away from home by simulating the jungles of their native Ithor.

The jungles were on the lower levels, while the cities and living areas were on upper levels. Each herdship measured 1,000 meters in diameter, and was designed to contain a complete and living ecosystem. A pilot and co-pilot maintained the herdship's systems, supported by a crew of up to 3,000 Ithorian workers dedicated to the herdship's upkeep. A herdship could accommodate up to 10,000 individual Ithorians, as well as up to 20,000 metric tons of cargo.

The spacefaring herdships were based on the earlier herd-cities. Because these ships traveled throughout the galaxy, most were armed with twenty laser cannons and four tractor beam projectors distributed around the herdship's hull for defensive purposes. They were nearly identical in appearance to the herd-cities, such as the Tafanda Bay, but were enclosed to allow space travel."

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