The show is to return March 31.
The Season 1 premiere of "Swamp People" set a record as History's best original series debut in all key demographics with 4.2 million total viewers, the network said.
"Deep in southern Louisiana there are nearly 1 million acres of flooded forest, marshland and bayous unlike anyplace else in the United States," History noted in a synopsis Wednesday. "It's a hidden world, a place where nature still rules -- one of the least known territories in the United States. But a hardy breed of swamp people knows the secrets of this dangerous, mysterious territory. Most are Cajun descendants of French-speaking settlers who came from Canada in the 1700s -- and their way of life has been fundamentally the same for generations. Hunting, especially alligator hunting, remains a major source of their livelihood."