As I was photographing these Brant Ducks, I also shot a series of the flying birds for a panorama, to see how it might work out. I was surprised it pretty much just worked out fine with no retouching of overlapping Brants. I was using a m43 camera with a Panasonic 14-140mm lens @48mm. I started on the left and just shot a quick series going to the right. I always shoot the pano of flying birds in the direction they are going. Seems to work better that way. The files adjusted in Adobe Camera Raw and the panorama assembled & blended in Photoshop for the final image.