I observed this bird in central California 7 March 2014. It was the size and shape of a Eurasian Collared Dove, several of which were in the area, and I think that is probably what it was. But the dark head and breast are unlike any ECD that I have seen before. Some Rock Pigeons might show something similar, but other features (the tail color and length, wing color) did not look much like a Rock Pigeon. I would welcome any opinions as to what the bird might actually be.
Thanks, rkj
Thanks, rkj