Netherlands - July 12 - Mandarin or Wood Duck (1 Viewer)

[Indobirder]

Hi everyone,

I photographed this female duck on July 12, 2019 in the province of Gelderland.
Based on some online searching, Mandarin Duck is a "countable" bird in the Netherlands, and seems more likely than a Wood Duck.

However, I'm not convinced one way or the other.
Can you help?

What are the key fieldmarks to check for when distinguishing between the two?

Thanks,

 

[Butty]

Flank-pattern and pattern around eye, as shown in European field guides. This is a mandarin.