Red-throated loon (Gavia stellata) , Arctic National Wildlife Refuge. , Arctic National Wildlife Refuge.
# Length: 17 inches Wingspan: 44 inches
# Sexes similar
# Immature like basic-plumaged adult, but with less well-defined face pattern
# Dark bill
# Large diving bird with long body that rides low in the water
# Thin bill is angled upwards at tip and is held above the horizontal
# Feet set far back on body, and trail behind body in flight
# Upperwings wholly dark in flight