@sieri I wonder how size influences their capacity to reach this state of "getting enough lift from wind without moving"...
You mostly see relatively big birds (prey birds) do it, but I think that's more for ecological reasons (looking for preys).
It would be nice to have an aerodynamic breakdown of the interactions of morphology, mass, and lift.
#ecology #FunctionalMorphology #birds #ReflectingAboutStuff #Aerodynamics