The Oak Tree. I traditionally have used the guinea fowl feathers in this piece as I thought that the white specks reflect the spots of light you can see through the tree when the sun is shining. However I have also tried this piece in other feathers as you can see and as with all the pieces it is totally personal preference. You can choose whichever feather you prefer. This picture is available in three different sizes:* Standard: 33x33cmMedium: 43x43cm Large: 65x65cm (*These measurements are to the outside edge of the picture frame) Please note every picture is unique due to the nature of the feathers & the process. When ordering please make sure to double check your feather choice on the grid of feather types. I make each silhouette to order and often show designs in my listings made with a variety of feathers types.