What sex are these two 1 week old chicks by wings.

[Devinbok]

Hi all. New chicken owner so I’m totally new to this kind of stuff. I was wondering out of these two pictures which one is the female and male. Also unsure of the breeds I have. Anything helps, thanks!

 

[Devinbok]

Hi all. New chicken owner so I’m totally new to this kind of stuff. I was wondering out of these two pictures which one is the female and male. Also unsure of the breeds I have. Anything helps, thanks!

Three of my chicks out of 7 are lacking tail feathers also so would they be roosters?

 

[AinaWGSD]

Feather seeing  only works if the chicks have been specifically bred for. And even then, it only works at 1-3 days of age. After 3 days it's no more accurate than any other old wives' tale.