The answer is THREE
You start at the T("tee") in the upper right hand corner.
If you go directly to the hole by going south-east over the letter ERN, you have gone two under par and made an EAGLE (a white tailed sea eagle, to be exact)
If you make it in two shots by going right over SMEW (the European water bird) and down over WREN, you have gone one under par and made a BIRDY.
You can make a BOGEY by going one over par in four shots by going down over GOTHIC, right over CHIMERA, then up over ALIEN, and then down and to the left over NO.