Shot at sunset in Perrot State Park.  Colors were fantastic.  Chose to expose for silhouette to bring out the colors in water.  Shot with my Canon 7D Mark II and a Tamarron 150-600mm set at 600mm on a tripod.   Due to low light and wanting to stop movement of the birds I used ISO 800, f/8, which resulted in 1/320 sec shutter speed in aperture priority.