"Bird-Feeding Frenzy"-one study shows effects of birdfeeding on birds

Interesting article from the National Wildlife Federation:
"Birders in North America and Europe put out some 550,000 tons of wild birdseed a year, yet scientists are only beginning to study the hobby’s biological effects
03-15-2011 // David Lukas

OUTWARDLY, there’s nothing momentous about filling a backyard bird feeder with seed. This simple act takes mere minutes, yet provides hours of backyard birding at little cost." 

Read the rest of this provocative article.