Sexing help

[Kidbee]

Hi all! I'm a new duck mum after rescuing a mallard duckling from a water drain (vets wouldn't take it in because of the bird flu). We have been doing our research into caring for ducks and have bought a friend so it's not lonely. Our Indian runner is 7 weeks old but we are unsure of the age of our mallard (at least 5 weeks), I just wondered if anyone would take a guess at what sex they are? It's difficult as we have nothing to compare them too. I've attached a video, the chirping is coming from the mallard.
Thanks in advance

<iframe title="vimeo-player" src="https://player.vimeo.com/video/724400127?h=43dda1e12e" width="640" height="1137" frameborder="0" allowfullscreen></iframe>

 

[cheezenkwackers]

It is a little early to tell but your Runner sounds like a girl and if I had to guess, I would say your Mallard is a boy. Some girls are just late quackers though.

 

[Fuchsia]

I agree with @cheezenkwackers, it's still a little early to tell. Maybe try posting another video in a week or two