The city of St. Louis has a strategy for its birds. Along the commercial corridors, on the dressed terracotta ledges of the older buildings, the evidence is there once you learn to look: steel spikes fanning from windowsills, reflective tape strobing in doorways, ultrasonic emitters tucked behind decorative molding. The industry calls it avian deterrence. It is the work of making a city unlivable for the creatures already moving through it.

Why Were You Not Here began with the opposite question not what art can do for birds in the abstract, but what it would mean to make a space materially, concretely for them. Through the summer before the exhibition, birds were fed daily on that block: no cameras, no documentation, no audience. Then the waiting at the windows, week after week, with nothing at the glass. And then one morning the trees filled at once, dozens of sparrows arriving in the branches together, and after a while they lifted and flew to the gallery windows in formation not cautiously, but ceremoniously, with the authority of creatures who had made a decision.

Mounted outside the glass is a door sized for a small bird: painted, hinged, set at the height a sparrow would approach, with a platform beside it and a staircase descending the face of the building. The door is real in every formal sense. It cannot be entered. It is not a trick and not an irony but an offering an acknowledgment that the space behind the glass was understood to be theirs. The gallery could not open the door the work had made. The work holds both the waiting and the arrival, and resolves neither.