Researchers: Starvation, weather to blame for New Mexico bird die-off

Starvation and unexpected weather are to blame for a statewide die-off among migratory birds in New Mexico earlier this year, researchers said. Biologists from multiple agencies collected hundreds of samples of warblers, swallows and other birds to be analyzed. The researchers found that nearly all the birds were severely emaciated, already starving when they moved into New Mexico.