Linked from
The 5 pages that link to Wing-propelled diving, each with the reason it gives.
AukBroader topic: Auks use their wings to fly through water in pursuit of prey.
Great aukRelated: The great auk pursued prey by flying through water with its short wings.
GuillemotRelated: Guillemots use their wings to pursue prey below the surface.
PlotopteridaeNarrower topic: Plotopterids used their wings to swim rather than fly.