Its more about the captive bred bird finding food sources at the correct time of year. The wild birds are programmed to go from one seasonal source to the next. For example now the Bullys are on the hawthorn buds, in a months time they will be on a different bud, then as summer goes, it will be berries, the honeysuckle, then onto the rowan. They move with the food, and i think letting a captive bred bird go wild is akin to murdering it by starvation.
Don't forget birds do not think or reason like humans. Their survival is already hard-wired into their brain from the day they are born, and thi