Can you tell the sex at 4-5 weeks old?

[EIEIO Funny Farm]

Not sure if it’s too soon to tell, but I’m concerned Sunshine might be a Roo. I’m certainly no expert, but it seems the neck feathers are pointy, but possibly it’s just the coloring. She’s also is very pushy with the other three chicks. Can anyone tell?
These are my Ameraucanas. the one on the left is Sunshine. Thank you!

 

[JubileeFarmer]

Male specific feathering doesn't start coming in until about 12 weeks of age so that's not what you're seeing. Behavior is also not a good indicator because pullets and cockerel behave pretty much the same at this age. Sometimes the comb and wattles on a cockerel will start to grow and turn red by 5 weeks but not always. I don't see anything about that bird that says it's a male but it's really too early to tell. It should be more obvious at about 7-8 weeks. Post new pictures in 2-3 weeks.

Someone with more experience with Ameraucanas might be able to tell from the color pattern.

 

[EIEIO Funny Farm]

Male specific feathering doesn't start coming in until about 12 weeks of age so that's not what you're seeing. Behavior is also not a good indicator because pullets and cockerel behave pretty much the same at this age. Sometimes the comb and wattles on a cockerel will start to grow and turn red by 5 weeks but not always. I don't see anything about that bird that says it's a male but it's really too early to tell. It should be more obvious at about 7-8 weeks. Post new pictures in 2-3 weeks.

Someone with more experience with Ameraucanas might be able to tell from the color pattern.

Thank you. I appreciate your reply.