Agreeing with some other users here:
Beautiful new additions, thank you for that!
But please change the double-use of [item=Umbral Yarn]. It's not exactly a common drop. Why not use items from the new biomes?
[item=Tadhop Beanie] and [item=Crocheted Tadhop Hat], for example, would fit the two birds perfectly, too.
Edit: typo.