The reason for the darker mornings during winter is because there are less and less birds around to chase the darkness away with their morning chorus. The birds who have decided to stick with the job find it harder and harder to get rid of the dark when there are fewer of them around to dispel it, therefore it takes longer. The problem is that migratory (otherwise known as quitter meany-pants) birds have moved off to warmer climes, leaving the locals to handle the job on their own. They leave at a certain stage of the year when they feel the dark has put on too much weight, and won't be as easily lifted. Of course this entices the darkness to arrive early as well, knowing it'll get a good lie in, it senses the fact that there are less feathery fiends around to scare it off the next day.
I propose that we start building cages NOW for next year, in an effort to keep the migratory (quitter meany-pants) birds in their places. They'll get used to staying around after awhile - and if they can be convinced to keep up the singing - then we can say goodbye to winter forever...
It's just a thought