2D and 1D spectrum of BiRD (NIRCam/WFSS). The dotted box indicates the five-pixel aperture used to extract the 1D spectrum. We see clear emission from He I, Paγ, and O I lines, superimposed on the continuum. The contamination from a bright source is visible at the red end of the spectrum. The flux density F_λ is expressed in units of 10⁻¹⁶ erg s⁻¹ cm⁻² μm⁻¹. The 1σ error spectrum is reported as a purple shaded area.