Seal or swan.
star
seal
bandoleersbusinessesbandicootsbuttoneersballoonersBraziliansbattalionsboyfriendsbellyachesbiologistsbeautifiesbadragglesbesmirchesbotanicalsbillboardsbubblegumsBostoniansbenchpressbrassieres
stork
skin
Smelt
Seal or swan.
Swan.
star
suha
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.
One such is "epiglottis."
Swaziland
salamander
Southern