Please identify

[5Kranch]

I ordered the following blue breeds: blue Australorpe, blue copper Maran, blue cuckoo Maran and blue olive egger (mixed between cream legbar and splash maran). I only have three blue shown below. Which ones are which and which one am I missing?

 

[gtaus]

Welcome to the BYC forums!

I found this online that might help...

Here’s a breakdown of the distinct traits for each chick type you mentioned — super helpful for identifying your mystery fluffballs!

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Blue Australorp Chicks​

• Color: Slate-blue to steel-gray down, often with lighter chest and wing tips.
• Comb: Single comb, usually small and pale at hatch.
• Legs: Clean legs (no feathers), typically slate or dark gray.
• Temperament: Calm and friendly even as chicks; easy to handle.
• Growth: They develop into large, robust birds with shimmering blue plumage.

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Blue Copper Marans Chicks​

• Color: Dark gray to black down with hints of copper around the face or wings.
• Comb: Single comb, may be slightly larger than Australorps.
• Legs: Feathered legs — look for fuzz on shanks and toes.
• Eyes: Large and set wide apart.
• Tail: Narrow and angled backward.
• Temperament: Docile and sociable, great for mixed flocks.

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Blue Cuckoo Marans Chicks​

• Color: Blue-gray down with white spots on head, chest, and wing tips.
• Pattern: Early signs of mottled or barred patterning.
• Comb: Single comb, medium-sized.
• Legs: May be feathered or clean depending on lineage.
• Temperament: Shy but friendly; quiet and good for urban settings.
• Eggs Later: Known for laying dark brown eggs.

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Blue Olive Egger Chicks​

• Color: Highly variable — often blue-gray, black, or brown with cheek puffs.
• Comb: Usually pea comb (small and flat), inherited from Ameraucana or Araucana parent.
• Legs: Can be feathered or clean; color varies (slate, greenish, or yellow).
• Face: Muffs or fluffy cheeks are common.
• Temperament: Curious and friendly; great for backyard flocks.
• Eggs Later: Lay olive-green to mossy-colored eggs.

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Quick Chick ID Tips​

Trait	Australorp	Copper Marans	Cuckoo Marans	Olive Egger
Down Color	Slate-blue	Dark w/ copper	Blue w/ white spots	Variable (gray, black)
Leg Feathering	No	Yes	Sometimes	Sometimes
Comb Type	Single	Single	Single	Pea (usually)
Cheek Puffs	No	No	No	Yes (often)
Temperament	Calm	Docile	Shy/Friendly	Curious/Friendly

 

[Frizzle and Friends]

My best guess would be the blue copper marans is the middle photo since it has heavily feathered legs. I believe the one you are missing is the blue cuckoo marans, since I'm not seeing even the slightest trace of barring on the other two. That leaves it between olive egger and Australorpe for the first and last photo.
The best way to tell them appart would be looking for a crest. The olive egger should be crested, though it may be small and hard to see.
I hope this helps, once they are older, you could post new photos and it may be easier to tell.