I've never understood where it got it's name 'cause I've never seen a Duck
eat any. :-)

I never did either until I went to the Kennet and Avon multi-rise locks. The
holding pools there were like fields - green with duckweed. I realised it
was water because there were swans swimming in it and they were eating the
duckweed. It was an eye-opener.

As were the multitude (in number and variety) of dragonflies.

Recommended for a summer visit.

Mary