[5] A three-year relocation effort to move approximately 50 Columbian white-tailed deer by helicopter to the refuge from the Julia Butler Hansen Refuge for the Columbian White-Tailed Deer occurred beginning in 2012 after the species was considered to be in danger after a dike was found to be in a state of imminent collapse caused during high water flow on the Columbia River that year.

[9] Stately sandhill cranes, shorebirds, Tundra swan, and a great variety of songbirds[10] stop at the refuge during spring and fall migrations.

Smaller mammal species such as coyote, red fox, raccoon, skunk, porcupine, bobcat, beaver, mink, river otter, muskrat, badger and brush rabbits are occasionally seen.

[11] The 2012 relocation efforts of endangered Columbian white-tailed deer to the refuge is considered a part of the doubling of the species population to over 900 in the Lower Columbia River basin by 2015.

This article incorporates public domain material from websites or documents of the United States Fish and Wildlife Service.