Hey Yall
Thought I would throw in my 2 cents here on visual and audio sexing of Geese. Aside from the sex linked birds (Pilgrims and Embdens as goslings). This is what I've found:
Canada Geese: Like Momma Gozzard says, males have long limbs (neck, legs wings), Necks are the best way to tell. The gander will also have a loud, deep, long and sonorous hong. Females will have the short raspy, honk, or more of a cluck. Females also appear smaller and flatter by having her wings out to the sides of her a bit and tightening feathers against her body (giver her the flatter smaller appearance). The females do this on purpose as a form of submission to make the male want to protect her, but to other females it is a dominance thing, the further out the wings are, the "tougher" they are. Males do the opposite, but with the same meaning (minus the protecting and submission part), he will hold his wings up higher on his back, and will often have his flanks slightly fluffed, deeper part of his breast, and tail flared slightly. He will also toss his wings when he is interacting with his mate.
Embdens, Toulouse, and most other Domestics derived from Greylag Geese: Males will have longer limbs again, and they will also have a longer more obnoxious "gooooooooog, goooog goog". They may also have a keel that hangs over to one side, and also, may have darker bills, eye lids and feet. Females will be more pale, call will be a shorter and more numerous "gooog gog gog" and they may have a double keel or one large one centered. Over all the females appear more stubby
Chinese and African: Males with longer limbs, stand much more upright and a strange walk and larger knob, call is a high pictched sound. Females with a normal stance and walk, smaller knob, and they honk.
Goslings: Females "peep" much more rapidly than males do in Canada geese, and is pretty much the same in domestics only it is harder to tell since both sexes have pretty rapid calls.
Jessica