Aves is a 4 letter word for birds. It is a class of vertebrates comprising the 9000 species of birds.
Rhea is a bird. It is 4 letters and starts with the letter R.
Tern
coot
A bird that has 8 letters and starts with s is: starling or snowy owl.
A swan is an aquatic bird starting with S and having 4 letters.
teal
erne
The Oriole is a bird that begins with letters or. The Oriental White Stork also begins with the letters or.
Macaw
Xeme
cardinal
'Wren'