Glauco Velásquez’s Borboleta is a beautiful, evocative work by an important but often overlooked Brazilian composer. It is characterized by its lyrical sentiment and sophisticated harmonic writing.
The performer must project a clear melodic line while managing the subtle harmonic colorings in the accompaniment.
Comparable difficulty and character — good candidates for what to learn next.
Borboleta is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 4.
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 Borboleta lasts about 3 minutes.
Borboleta 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 Für Elise by Ludwig van Beethoven, Aus Meiner Kindheit by Sergei Eduardovich Bortkiewicz, 'A primma vota! by Ernesto De Curtis — see the full similar-pieces list on this page.