Hummingbirds help with pollination as well.
It seems that migrating birds were not considered part of the eco-system when the ‘climatologists’ promoted those ugly wind farm killing machines as a ‘power source’.
The air turbulence they could have harnessed can be felt on all the high speed interstate highways. Just line the concrete highway dividers with turbines and figure it out.
p.s. Not an engineer - just a gran’ma;
All types of insects also help with pollination.