Here is the full list of all 19 Catch a Duck achievements.
Eat your first duck
Eat 5 ducks
Eat 10 Ducks
Eat 25 Ducks
Cause 10 brawls
Cause 25 brawls
Cause 50 brawls
Make a Hunter kill another Hunter
Catch 30 rabbits
Die in a trap 10 times
Cause 75 animals deaths
Get eaten by a bear
Hide from animal that's chasing you 10 times
Cause 10 wolfs to fall into a trap
Unlock all bonus levels
Earn 250 000 points
Earn 500 000 points
Earn 750 000 points
Complete all levels