@samae
I don't know for the "fly in perfect groups" part, but for the navigation part such hypothesis is actually supported by some experimental evidence for some birds like the European robin, see https://en.wikipedia.org/wiki/Cryptochrome#Magnetoreception

Here's #AndreaMorello (best known for his work on silicon-based quantum processors https://newsroom.unsw.edu.au/news/science-tech/quantum-computing-silicon-hits-99-cent-accuracy ) explaining that __hypothesis__:
https://www.fqt.unsw.edu.au/video/bird-navigation-the-quantum-around-you-ep1
#QuantumMechanic