A study published in the journal Science reveals that since 1970, bird populations in the United States and Canada have declined by 29 percent, or almost 3 billion birds, signaling what has been considered a widespread ecological crisis.
The results show tremendous losses across diverse groups of birds and habitats — from iconic songbirds such as meadowlarks to long-distance migrants such as swallows, and backyard birds such as sparrows. More research is needed to pinpoint primary causes for declines in individual species. » Continue Reading.
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