Birdie

From the Super Mario Wiki

A Birdie is a score that can easily be achieved in the Mario Golf series. A Birdie is a score equal to 1 below PAR. Birdies can be achieved on 3, 4, and 5 PAR holes. Almost all characters can reach the hole to get a Birdie.

In Mario Golf: Toadstool Tour, Birdie Best Badges are blue in color.

Mario Golf Scores
Hole in One | Albatross | Eagle | Birdie | Par | Bogeys