Montage of all the CO transitions observed towards HH377. Line profiles are drawn in thick black. Spectra enhanced with a magnifying factor in order to enhance the high-velocity emission are drawn in thin red. Fluxes are expressed in units of antenna temperature , corrected for atmospheric absorption (for ground-based observations). The ambient cloud velocity (v_lsr = −10.9 km s^-1), the peak velocity of the protostellar jet (v = −125 km s^-1), and the bowshock HH377 (v = −68 km s^-1) are marked by dashed blue lines. On the right hand side of each panel we have indicated the observatory and the HPBW in arcsec.