US and Canada have lost more than one in four birds since 1970 — theguardian.com

Three billion birds have been lost across diverse groups and habitats, in what researchers describe as a ‘wake-up call’The US and Canada have lost more than one in four birds – a total of three billion – since 1970, culminating in what scientists who published a new study are calling a “widespread ecological crisis”.Researchers observed a 29% decline in bird populations across diverse groups and habitats – from songbirds such as meadowlarks to long-distance migratory birds such as swallows and backyard birds like sparrows. Continue reading...

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