drought and birds - again

Some more reading on this topic:

http://www.wildlifeextra.com/go/news/usa-drought.html#cr

http://www.wildlifetrusts.org/node/11186

http://www.columbiamissourian.com/stories/2012/07/04/how-columbias-wildlife-suffers-extreme-heat/

Ph by T. Castelazo; Wikim. Commons

http://icb.oxfordjournals.org/content/40/4/597.full