Simple question, would you tick Wood Duck in the UK?
If yes for Mandarin then why not Wood?
neither for me I'm afraid
Mandarins are BOU category C birds and therefore officially part of the British List. Wood Ducks are not, the reason being they they have not established a feral population that can sustain itself without human assistance. That may change in the future, but the last I heard there was no sign of it doing so.
Of course there are those who 1) think some of the Wood Ducks that have turned up in the west are genuine vagrants and 2) who don't give a monkey's about the BOU. Your money, your vote.
Jason