OK, however, a female Varied Thrush would not be a bright orange but more of a pale-muted orange.
Another thing to take into consideration is that in the field birds often look smaller/larger than they really are especially if they are on the ground.
The ''necklace'' you described seems more like a breast-band so here are a few more suggestions...Killdeer, Horned Lark, Semipalmated Plover and this one is probably a stretch...Northern Lapwing. ?