I agree, but it´s difficult on behaviour only, because when you get two of the same sex, they can behave like a pair...I feel at least one is a male, but then I have a goose that didn´t manage to hatch out her own eggs, but she´s behaving like a gander after having "paired" with her sister to look after her sister´s young! Extremely protective against all other birds.By behavior I would guess a pair. Pictures look like 2 girls. Boris my gander didn't really start walking upright more till he was 7 months old.