Hi there and welcome to the forums!
They’re so cute~ I agree with the above. Sky, Tweety, and Sadaf appear to be male. Pirate is female but Blue is hard to tell because of the lighting. Could you post better photos of Blue and some of Sadaf to confirm as well?
Meanwhile, please be sure to read through the links provided above to ensure you’re up to date on the best of budgie care practices! If you have any questions after doing so, please be sure to ask as we’d love to help. Hope to see you around~