Loved reading this, I've seen many grieving wild birds, many were brought to the avian rescue after losing mates. I've seen companion birds mourn, too. My Cockatiel, Pearl, sat still & wouldn't eat when her mate died suddenly the night we had a terrible, loud thunderstorm. I always closed the shades & provided a night light, so car head lights or lightening would not startle my birds. The storm had thunder so loud it shook the house. She mourned for 2 months & I actually hand fed her to save her. Eventually she began eating & preening again, but it was a year before she started chirping & whistling again, and it was 2 years before she'd accept attention from another male. My oldest male Tiel rescue, complete with bald, head, named Old Man already, before I got him...he'd gently try to preen her crest, she'd make her "annoyed" whistle, peck at him & scoot away, but he was persistent & gentle. Eventually, she put her head down one day & let him preen her. They became mates & even raised some young. Years later, she passed at 21, and Old Man passed a few days later despite my best efforts. I'm not sure how old he was but he was older than Pearl.
I agree wholeheartedly that animals, including birds, can mourn & grieve.
