Lege's Butterflies is a virtuosic miniature that requires significant technical command. It is distinguished by its rapid shifts and delicate textures that emulate the flight of insects.
Achieving evenness in the rapid running passages is the primary challenge.
Comparable difficulty and character — good candidates for what to learn next.
Butterflies is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Butterflies lasts about 3 minutes.
Butterflies is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Blumengruss by Wilhelm Lege, Barcarole by Wilhelm Lege, Alexander's Ragtime Band by Irving Berlin — see the full similar-pieces list on this page.