Air Plants bird ring
The air plant Tillandsia, which is a popular genus of air plants.
The one hanging down with its curly appearance could be Tillandsia usneoides (commonly known as Spanish moss),
and the one sitting on top is another variety of Tillandsia, like Tillandsia ionantha.
Tillandsia are epiphytes, meaning they don’t need soil to grow, making them easy to display in creative ways, like in your hanging arrangement.