You won't be able to tell without vent sexing until your duckling is about two months old. I hope this helps. :) God Bless. :)

You can't tell by the tail right now. You have to wait until he gets all his feathers.

Wait until 5 weeks thats when your more sure.

Vent sexing is to be done by professionals

Is my duck Jazmine a boy? It's about two weeks old.