There is a short period of time when you can find the mergansers once the waters opens up. I think the most difficult is to find a safe place to park the car to photograph them or seeing them from a distance and not being able to get there (lucky them)! You can be so focused on getting the shots before they move away, you forgot how dangerous it can be with vehicles zooming by you. I must admit I do get mad at people not slowing down but it is what it is. Here are some Common and Hooded Mergansers found in some of the local ponds and lakes nearby.