grebe
gulls
Gull.
· Quetzal (a bird)
an aquatic ecosystem
A six letter word for a bird of prey starting with the letter R is "raptor."
word
grebe
puffin, or just a bird is a parrot.
A swan is an aquatic bird starting with S and having 4 letters.
Goose
crane
Gull.
loon
It could be a Plover.
Teal
unique - they are different from other bird species
A possible word is pelican, a large aquatic bird.
wren tern gull dove coot Ibis swan