A yellow bird costume dress would likely be a fun, colorful, and playful outfit inspired by the appearance of a yellow bird. Here are some details you might find in such a costume:

1. Color: The costume would predominantly be a bright yellow, mimicking the feathers of a yellow bird.

2. Dress Style:

   • The dress would typically be flared or ruffled, creating the illusion of feathers. It might have a tutu-style skirt with layers of soft, feathery fabric.
   • The top could be fitted with a feather-like texture or a sleek, smooth design, often resembling bird wings or a soft plumage.