Morning frost clings to tall grasses at Chase Lake National Wildlife Refuge in North Dakota. Half water and half rolling hills, Chase Lake plays an important role in the conservation of the American white pelican, hosting a large breeding population in the summer. Those big white birds won’t be back for a few months, but there’s still lots to see and do at the refuge. Sunrises are a great way to start the day. Photo by U.S. Fish and Wildlife Service.