Birds - More Proof of Climate Change

In North America, there is compelling evidence that over 200 bird species have experienced northward range shifts consistent with climate change (e.g. La Sorte and Thompson 2007, Hitch and Leberg 2007, Zuckerberg et al. 2009). Similar findings have been reported in Europe (Thomas and Lennon 1999, Brommer 2004), where the largest climate change induced range shifts have been recorded (Maclean et al. 2008). However, despite this, the magnitude of these responses may still be insufficient to keep pace with climate change. In France, for example, the temperature increase since 1989 is equivalent to a northward shift of 273 km; however, over the same period there has only been a 91 km northward shift in bird community composition (Devictor et al. 2008). Effectively, birds are lagging behind climate warming, and the long-term implications of this discrepancy could be profound.

http://wickershamsconscience.wordpress.com/2013/11/30/climate-change-and-birds-more-proof/