The Summer wing ponies were smaller ponies with butterfly wings, made of a type of bendy plastic that was more sturdy than the flutter ponies. Their wings were not removeable.
Buzzer Glow High Flier Lady Flutter Little Flitter Sky Dancer
Lady Flutter is a pink summer wing pony with green, yellow and pink wings and white hair. She has yellow freckles on her right cheek and a yellow ladybug cutiemark. Mine came to me with a bent wing and no tail. I retailed her with Shimmerlocks' "Angel". Mine also has several spots of regrind (I adore regrind). She has 2 regrind spots on her face, One on her neck, and two on the back of her neck (though all her spots are a bit faint and hard to see)
Little Flitter is a yellow summerwing pony with blue, pink and yellow wings. She is supposed to have fading pink hair, but mine has white (as I had elaborately styled her before I realized she wasn't supposed to have white hair. Oh well, she's gorgeous like this!) Her cutiemark and a symbol on her face is of a little pink hummingbird. I bought mine for only 5 dollars because she was missing her wings and has writing on the bottom of her hooves! I made her new wings (cut from a plastic folder and then I used alcohol markers to draw her wing pattern best I could!)