four walking ducks in a row silhouette set against a blue backdrop

blue turquoise deep dark drake backdrop background computer generated graphics illustrations isolated two three dimensional dimension jet black bold outline outlines outlined silhouette shape shapes shaped duck ducks duckling ducklings row rows aligned align quack quacking bill bills web webbed feet foot h1n1 h5n1 bird flu influenza h2n1 farm farms animal animals mammal mammals amphibious afloat buoyant swim swimming poultry meat farming wildlife wild life aviary avian yellow fur furs feather feathers fly flying flightless head space headspace