tree? :D
Tern
Crow
chat
Hawk
Dove or Crow
Rhea is a bird. It is 4 letters and starts with the letter R.
Hawk
Tern , gull ,
bird
A duck and a swan are both water birds with four letters.
BIRD! that has 4 letters doesn't it? :) Try Olor- It's a mute swan (whatever that means :/)
crow