-1 echoes of the beast (+1 athletics when sprinting)
-1 claws
-2 inhuman strength
-2 inhuman speed
-4 supernatural recovery
+3 catch
-1 long strider (+2 athletics when sprinting)
-1 wide-angle vision (+2 alertness vs. ambushes)
-1 desert adaptation (+2 endurance vs. heat; an emu might not fare well if dropped into the middle of the sahara, but they are reasonably well adapted to hot, arid, environments)

(unspent: +1)
+6: athletics, alertness
+5: fists, endurance
+4: lore, investigation
+3: conviction, scholarship, might
+2: discipline, empathy, rapport, survival
+1: presence, deceit, performance, stealth

details on individual forms:
Johann has only two emu forms worked out, one male and one female; he hasn't seen any particular need for access to greater variation.