three flying ducks or geese or swans silhouette in diminishing size from upwards to downwards

white three big bigger small smaller diminishing size sizes sized backdrop background computer generated graphics illustrations isolated two dimensional dimension jet black bold outline outlines outlined silhouette shape shapes shaped features featureless detail detailed details detailing texture textures surface surfaces opaque trace traces border borders water bird birds duck ducks geese goose swan swans feather feathers wing wings bill bills quack float floating annual migrate migration migrations monogamous breeder breeders hunt hunting season seasons open