Do black wings have better aerodynamics? This news article links to a 2019 academic study:
Thermal impacts of wing coloration on surface temperature during bird flight.
Most of birds have dark upper wing feathers. Dark colors keep a sunlit surface hotter compared to white colors.
Do black color or hotter surfaces improve the aerodynamics of wings?
A key consideration might be airspeed: fast air over a plane wing doesn't allow time to heat up the boundary layer so much. Birds and sailing boats operate at much slower airspeed so maybe those get some benefits?
For the bird analogy, you're thinking about this wrong.  Birds have dark upper wings for camouflage, not for aerodynamics.  A predator above them is less likely to see a dark top against a darkish background (the ground).  This is the same reason that many birds have lighter colors under their wings - that looks a bit more like the sky.