Rep. Ryan Zinke (R-Mont.) has a go-to talking point for condemning bureaucrats in Washington, D.C.: You cant manage the Yellowstone River if you dont know where it is.

But despite previously overseeing Americas national parks, including Yellowstone, which is named after the mighty river that cuts north through the park, Zinke seems to have forgotten which agency manages the nations crown jewels.

In a letter this month to top Biden administration officials, Zinke and fellow Montana Republican Rep. Matt Rosendale confused the Bureau of Land Management and the National Park Service, two agencies within the Interior Department. Zinke served as secretary of the Interior Department under former President Donald Trump for nearly two years, until he resigned under a cloud of scandal in early 2019.

From National Parks to natural resources, the BLMs management of land in Montana is of great concern to the people of our state, Zinke and Rosendale wrote.

The National Park Service, not BLM, manages Americas national parks. BLM is the nations largest land manager, overseeing more than 245 million acres of public land across the West, as well as 700 million subsurface mineral acres. BLM also manages or co-manages more than two dozen national monuments, a separate designation from a national park.

But once BLM-managed lands become part of a national park boundary, those lands fall under NPSs purview.

Zinke and Rosendale did not respond to HuffPosts request for comment Thursday. NPS and BLM also did not respond.