One of the decorations for the Blackbird Festival was a large blackbird, made from over 50 paper feathers that was over 24 inches across.
To start, I made a rough sketch of a silhouette of the bird onto oaktag (poster board?).
I cut out some feathers (making a template for those as well) and found I needed way more than I created.
So, I went to the store and found black foam board, sold in sheets near the school supplies.
Lastly, I added an orange beak made from card stock and an eyeball.