It was a day just like any other, Fluttershy was feeding her animal friends just like every day, looking forward to afternoon tea with Discord. When a bird she has never seen before waddles out of the Everfree Forest, and starts trying to eat her bear's fish. Confused, she takes the bird inside and calls for Twilight's help hoping she might know what has wandered into her backyard, she does. When Discord arrives, he and the bizarre flightless bird quickly become attached.

I don't own the cover image, duh.
I give full credit for the birds name to LightningBass94 who won 15 internets in my poll a while back.