BIRDS OF A FEATHER — Billie Eilish
“BIRDS OF A FEATHER” by Billie Eilish is in D major, and the commonly cited lead-vocal range is A3–D5 — 17 semitones — which rates medium for an untrained voice.
Whispered dynamics over a steady pulse, with a late climb to sustained head-voice notes at the top of the staff — the loudest moment of the song is also its highest and most exposed. The challenge is producing a clear, supported tone at very low volume for three minutes, then opening up without the seams showing.
Figures are the commonly cited range and published key for the studio version (Musicnotes original-key arrangement, A3–D5 in D major), not lab measurements. No lyrics or melody are reproduced here — this page is about what the song demands of a voice.
A song's written range and its singer's full range are different facts — the library page shows what the artist can do beyond this song.
This song asks for A3–D5. Take the free range test and this page will tell you whether it sits inside your voice — and by how much when it does not.
The song library has public-domain songs you can sing along to with live pitch feedback, and guided warmups that extend range.