Started to read the study......... Pretty intensive read.
It seems to be just a quantitative study. Not delving into a whole lot of what they feel the reasons are. If I were a betting man, it'll be turned into another "global warming" thing.
Would like to see 3 things mentioned that will probably get back burner treatment....
#1. Avian influenza
#2. House cats (The Audubon Society estimates 1.5 - 3.5 BILLION birds per YEAR are killed by house cats)
#3. This study was based on 1970 bird populations. RAPTORS got total protecton in......(drumroll)..... 1969. Raptors are one of only two groups of birds to show an INCREASE during the window of the study. Just sayin'........