Consider the fowls of the air!
On the wings of a iridescent, grey pigeon? A white dove is a popular symbol for the Holy Spirit. The bird that showed up at Jesus' baptism, however, was more likely a rock dove (grey with an iridescent green and violet neck) – more commonly known as a pigeon. Though most of us have separated categories for pigeons (dirty) and doves (pure), ornithologists will tell you, the names are interchangeable.