Sherburne National Wildlife Refuge Early Morning Sunrise © John Casey
Early morning sunrise over Bergerson Pool, Sherburne National Wildlife Refuge, Zimmerman, MN

Sherburne National Wildlife Refuge Great Egret with Fish © John Casey
Great Egret after successfully catching a small fish.

Sherburne National Wildlife Refuge Super Moonrise © John Casey
December Supermoon over near-frozen Bergerson Pool, pushing the pink sunset sky out of the way, Sherburne National Wildlife Refuge, Zimmerman, MN

Sherburne National Wildlife Refuge White-Tailed Deer, Doe © John Casey
White-Tailed Doe in tall grass during late afternoon on Sherburne National Wildlife Refuge, Prairie Drive, Zimmerman, MN

Sherburne National Wildlife Refuge Sunset over Nelson Pool © John Casey
Sunset over frozen Nelson Pool, Sherburne National Wildlife Refuge, Zimmerman, MN

Sherburne National Wildlife Refuge Great Blue Heron © John Casey
Great Blue Heron fishing at Nelson Pool, Sherburne National Wildlife Refuge, Zimmerman, MN

Sherburne National Wildlife Refuge Trumpeter Swans © John Casey
Trumpeter Swans looking over their back at Nelson Pool, Sherburne National Wildlife Refuge, Prairie Drive, Zimmerman, MN

Sherburne National Wildlife Refuge Sunset over Nelson Pool © John Casey
Sunset over frozen Nelson Pool, Sherburne National Wildlife Refuge, Zimmerman, MN.