"Trespasser" is the sixth track (side 3, track 1 on vinyl) on the extended version of Bird Box Original Score.
- Bird Box Original Score
This is the only known version. The track opens with disturbing, indistinct voice-like sounds, and an equally indistinct sound reminiscent of sirens and screams builds underneath. This eventually gives way to various unsettling drones mid-way through. More indistinct and distressed voice-like sounds follow for a short time, before giving way to buzzing sounds and high-pitched wind sounds.