Agree that bird is male, but 4 weeks is too early to call pullet with confidence, especially on an Orpington. Those combs can pop up later and surprise you.Got 9 straight run chicks 1 wk old from a local breeder 4 weeks ago. They are split between Black Australorp and Aus x Lavender Orp. I think we lucked out and got 8 pullets and 1 cockerel. the first 3 pics are the suspected male, # 4 is typical of the other 8 and the last is a group shot with Mr? out front. He? seems to be the leader of the pack much of the time and does more strutting than anyone else. Opinions please.