You need to get to the refuge early in the morning and find which pond the birds decided to use for the night. You might have to drive a few miles around the loops to find their favorite pond. You also need to plan where you want to stand to get that early morning light on the birds. You need to take in to account wind direction since that will dictate which direct they will take off. And lastly, you need to focus on your background so you don’t have busy out of focus birds or bald sky.