@Ardashir  
Many. One of the favorite things I like about DVD/Blu-Ray special features is looking at concept art. The same happens with live action movies and shows too since certain special effects and costumes have to go through multiple designs too.
 
Which is why I’ll never understand why so many people reacted as if the sky was falling with the G5 concept design leaks but I digress.
 
@Amethyst_Crystal  
Her current design seems to be based off a Cockatoo. They probably should have went with another pirate for her design like a Macaw of some sort. That way they could have the parrot pirate joke in the design while not making her look too much like a griffon.
 
I like both the final design and this one though. For different reasons.
 
@angyel  
@thps48  
Yeah that could explain why her design was changed, at least in terms of her overall color scheme.

I wonder, how many variations of a character usually get done before the animators decide on the official version?

Lol she was going to be a seagull

Whozits said it. She’d have clashed with Tempest’s colours had this been her final appearance. :3

This one’s not bad. But I like the official one better.

Not a fan of the pink,  
but otherwise I think this bird design is even prettier and more unique.  
Final Celaeno one looks too gryphon.

I guess it was cut because it’s not colourful enough.

@Background Pony #030C  
i do like the tails they have though. makes me think of dinosaurs. saurian dinosaurs are related to birds after all.

the colors pretty much reminds of Tempest Shadow’s colors

@soundtea  
Yeah, I guess you’re right.

Wow, birb Waifu is more awesome than I thought.

Surprisingly, according to art book, “Harpies” never had wings, they were wingless from the beginning.

@Joshua  
Seriously, quit whining about controversy when its a few people in general.

Oh my gosh, FINALLY; an original concept that was cut out and yet is NOT the subject of controversy in the fandom. Close call, dude.