Climate Change is not a factor of the turbulent weather, and Earthquakes to come. The turbulent weather is just one of the "Signs of the Times". The other signs are the out-of-control corruption of most if not all nations, the increasing Violence, the out of control strange immoral culture that has kidnaped the little children, even to the point that little boys will not have the chance to grow up to be real Men. Concerning the birds dropping dead, Creator GOD is putting the birds through a perseverance test: the birds are tempted by GOD to fly past their ability without resting. Because the birds only have so much energy food in their bellies, therefore the weaker birds drop from exhaustion and the stronger birds keep on flying to regenerate again. I truly believe all animals, the fish that were found dead on the shores, and all life on the surface of the Earth will be tested to endure, because of "End Time Events" coming our way.
I don't know if you are acquainted with the "Scriptures", but Revelation 3:10 just about says it all.
Revelation 3:10 Because you have kept My command to persevere, I also will keep you from the hour of trial which shall come upon the whole world, to test those who dwell on the earth.