Mystery dove

by Elizabeth A
(Red Deer, AB, Canada)

Into my back yard flew a grey dove-like bird with a grey head, neck and breast with a dark blue triangle on the breast (straight across with point going down the breast), arrow like dark flecks on the grey on the breast below the triangle, the wings and tail were black and white and when it flew away the under web of wing and tail was a bright yellow. Size and shape of a dove. Very pretty indeed. Anyone know what this bird could be?