Both yellow-bills are still persecuted both on their breeding grounds and on migration. I won't get on my soap box!
I prefer to dwell on the achievements of these magnificent birds. The stat that stands out for me is the altitude they can fly at.
"Perhaps the most impressive altitude record is that of a flock of Whooper Swans which was seen on radar arriving over Northern Ireland on migration and was visually identified by an airline pilot at 29,000 feet"
|Whooper and Mute|
|A lone grazing Brent|