I heard one, and finally saw him high in an Ash Tree, while working with an outdoor work team on Saturday morning.
Probably breeding around here, but possibly passing through. His call is said to resemble that of "a Robin who had singing lessons." Great description.
This not-uncommon Eastern songbird, which likes deciduous woodlands, is like a large finch. They are even known to visit bird-feeders sometimes. The male is dramatic, while the female looks like a large sparrow with a large beak.
You can read more about them, and listen to their song, here.