The Dunedin District Court heard this week that kererū numbers were on the rise in the city but the removal of one bird could have a ripple effect among the local population.
A Department of Conservation report for the court stressed New Zealand was the only country where kererū — voted the national Bird of the Year in 2018 — were found and they were seen as an important species for "forest health and diversity".
''I've no doubt you knew what you were shooting at,'' Judge Michael Turner said.
The court heard Parsons was at the back of his home which bordered Woodhaugh Gardens on December 11.
He had set up targets along a fence and after shooting at them he took aim at the native bird which sat in a tree of a neighbouring property.
The slug hit the kererū in the chest, it fell from the tree and landed on top of a shed.
It was taken to the Department of Conservation for treatment but was euthanised several days later because of damage to its wing.
Counsel Brendan Stephenson said it came down to a "very foolish decision that's been made on the day".
His client had no previous convictions, he said, and shortly after the incident went to a DoC office and made a $150 donation.
Should a fine have been imposed it would have been nearly $10,000, Judge Turner said.