The butterflies are insects appearing on The Backyardigans merchandise.
Looks
The butterflies all have antennae and large, brightly-colored wings.
Appearances
The butterflies have not appeared in any episodes of The Backyardigans, but appear on merchandise and various promotional images. A butterfly also appears in the Bug Hunt book, on a sticker sheet, and on the "Backyardigans Spring Mobile" printable from NickJr.com.