The article you cite is a good example of a non-scientist putting two and two together and making five. It gets off to a bad start:
The magnetic field causes a bubble around the Earth which protects it from solar winds, asteroids, and other objects in space.
Curious how we don't seem to be protected from tiny objects such as meteors, which can be seen as shooting stars on virtually any night.
The Goethe-Universitat study revealed that if birds could not see the magnetic field when migrating, they lost their "bearings" and could hurt themselves or even die. NASA reported in 2008 that there was a "massive breach" in the Earth's magnetic field, detected by THEMIS spacecraft. Solar wind can flow through this breach, causing enormous geomagnetic storms. It is very possible that such a geomagnetic storm is responsible for the current deaths of thousands of birds across the planet.
The first sentence is quite possibly correct, although I'm not familiar with that particular study. The 2008 geomagnetic storm is a complete red herring, however. How is a storm in 2008 responsible for bird deaths in 2011? Incidentally, the "massive breach" closed after about an hour. If we look at geomagnetic alerts for January 2011 here, we find nothing for January 1st, the date of the Arkansas blackbird deaths, nor for most of the following week when the media were going into bird death overdrive.
This article is fishing for links which aren't there and shouldn't be taken as anything other than ill-informed speculation.
Could it be possible that our field is moving and weakening so fast that it could affect human life?
The Earth's magnetic poles are always moving and the magnetic field strength is currently weakening, but neither are happening very fast. The field strength has a few centuries to go before it reaches a value which might be considered low. There is no evidence of the magnetic field having any bearing on human life.
We know we survived a pole shift in the past but is it possible it also had disasterous effects as well?
There is no correlation between past geomagnetic reversals and mass extinctions. I should add that polar wander is not the same as geomagnetic reversal, the last of which was 780,000 years ago.