Buff Orpingtons were the first birds I practiced wing Feather Sexing, & it's been accurate.
Males presented Even Over Lapping coverts, & no visible primaries at 5 days old. The coverts are all short, & rounded.
They're slow to feather out, usually grow in their tails later, or remain shorter for a few weeks. They usually get their comb, & wattles early, & pink up.
Females have long primaries, & short primaries that create a long, short, long short type feather pattern when the wings are spread out at 5 days old.
They feather out a bit faster, grow in their tails before the boys, & their combs, & wattles stay small, & pale.
Males presented Even Over Lapping coverts, & no visible primaries at 5 days old. The coverts are all short, & rounded.
They're slow to feather out, usually grow in their tails later, or remain shorter for a few weeks. They usually get their comb, & wattles early, & pink up.
Females have long primaries, & short primaries that create a long, short, long short type feather pattern when the wings are spread out at 5 days old.
They feather out a bit faster, grow in their tails before the boys, & their combs, & wattles stay small, & pale.