Like someone else said, location would help. I went with Scarlet Tanager assuming you are in Iowa. That would be the more common bird in that case. Here's another pic of a molting scarlet tanager that's looks quite a bit like yours.The bird id app i installed saiid a summer tanager. The bird was there early spring so not when the internet says the scarlette tanager molts. The tan spot on the back of the head made my parents think it wasn't a tanager