I was actually ready to go home after having shot for an hour.
I had just packed my gear in my bag, except my tripod. I spotted these 3 swans from a few hundred meters away and having taken a few shots of other birds in front of the sun earlier, I considered the situation. The earlier shots had been quite bad, but the sun was now in a very good position and the swans at a good height.
I decided to run as fast as I could towards my previous location (about 250 meters from where I stood. I had very short time so I had to sprint), while trying to unpack and find the right settings for my camera. I made it just in time to snap 5 shots, of which 2 turned out great.