When my husband was alive, we did not have inordinate difficulty in guiding small mammals and birds out of the house. Open the windows, open the doors, employ a coordinated pincer movement wielding brooms or (for birds) light fabric, and after the animal ran or flew past the opened doors and windows several times, we would get it out.
Now I live alone, and have just experienced how much an agile second person helps. The $%*# bird (adorable, but stupid) flew from end to end of the bedroom multiple, multiple times, ignoring the large opened window. Finally, probably by chance, it saw the open window and flew out. WHEW!
Now to put the furniture back (moved to make hiding places less attractive), mop up the trail of bird seed (totally ignored), and otherwise clean up. The bird's intestinal tract was in working order.
I called a neighbor to help, but the bird flew out just before she arrived.
Any suggestions as to what to do next time? For example: Bird traps? A small bird cage with irrestible food? (I already have a Havahart chipmunk trap.) Anything to put in the open window to make it more noticeable to a scared, trapped wild bird?
This is not a question about bird-proofing or chipmunk-proofing the house. The critters are brought in by the indoor cat, who has free access from the house to a large wired oudoor enclosure, whose mesh is coarse enough to admit small birds and tiny mammals. This doesn't happen often enough to rebuild the enclosure with finer mesh -- YET.