Would it be possible for you to tell us the ideal date and time for birds to arrive at their destinations? And has this always been the time and date on Earth or has it varied perhaps just a tiny bit here and there?
No. But there's a whole lot of studies out there that can explain how migration timing works. Try Google.
“Would it be possible for you to tell us the ideal date and time for birds to arrive at their destinations? And has this always been the time and date on Earth or has it varied perhaps just a tiny bit here and there?”
The purveyors of the global warming insanity love their anecdotes about melting glaciers, polar bears in distress, and migratory birds who are supposedly late. On the other hand, temperatures haven’t risen since 1998, there is an alternative sunspot-cosmic-ray based theory that has been successfully lab-tested, and the physics of the greenhouse gas theory has been refuted by geophysicists. Not to worry; the global warming crowd has the votes, and in a political-religious dispute votes count more than facts.