Gander - which one?

Stopped on the way home to feed the geese and ducks. I was amazed at how aggressive one of the swans was to the other swans. There was a lot of open wings and chasing and pulling out feathers mostly by one one swan.

I have blipped these two geese, as I liked them. It got me thinking about the nursery rhyme goosey goosey gander and I looked up the word gander - which is a male goose. Not sure which one iis the male here.