Grosbeaks not afraid: must migrate from suburbs?

by Gary
(Eaton Rapids Township, MI, USA)

My home is in the Michigan woods and very remote. I have many birds and provide them small black oil sunflower seeds in addition to 23 acres of natural dense foliage. I've noticed that the R.B. Grosbeaks are not afraid of me at all. I don't know if that's their nature (like Chickadees) or if they're migrating from an area of low human danger, like maybe suburbs in the Southern US. Since we all hunt around here, the non-migratory birds fear humans. But the Grosbeaks will stay at the feeder even as I walk within 5 feet of them. Very unusual.