bird = flight path vector, sorry
When in manual flight with FPV and no FPD the heading FCU window opens an allows you to select a blue heading index not only on ND and compass strip in PFD (usual) but also a little vertical line appears on the horizont line in the attitude indicator. Set this to runway heading / inbound course and keep the FPV aligned just like for circuit training. The index is called "track bug" FCOM 4.05.70 p30 or "second selected headnig / track index" FCOM 1.31.40 p16 "2".
FD
(the un-real)