This includes the diagram for vent
sexing . To make it easy adult males = curly tail feather plus a
raspy non quacking sound from about 10 weeks. Girls quack
for Britain and can clearly be heard from about week 5 / 6 .
The getting personal diagram below is for breeders to check at
about a week old . Yes it says day old but too much trauma and
manhandling is not popular. . . they are different to chicks
On a new page to print easier.
This requires a dry duckling
preferably before breakfast/good light or alamp/short
fingernails and patience to learn. Try once mark the duckling
and when the males voice drops then check your success rate.
Contrary to opinion ducks and geese can be sexed at any age .
Chickens must be vent sexed at under 24 hours old with no food
or water or their sex organs are hidden as they grow which is
why feather sexing is now more common
Drawing below is from 1904 but it is the clearest most obvious
description so I cleaned the pic in Photoshop .With an adult goose
a knowledge of various wrestling holds and often a strong coat is
useful. I once watched a male friend show somone how to sex a
large Embden gander wearing shorts and T shirt .. gander won but
the video would have made a fortune