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After a winter of temperature swings, reports of birds breeding at least a month earlier than normal has one wildlife rehabilitation centre concerned.

After a winter of temperature swings, reports of birds breeding at least a month earlier than normal has one wildlife rehabilitation centre concerned.

Whole genome sequencing of North American song sparrows has revealed the genetic underpinnings for a stunning range of body sizes found throughout the bird's westernmost range-an adaptation that may make the birds more resilient to climate change.

<p>Scientists have unlocked the genetic basis underlying the remarkable variation in body size observed in song sparrows, one of North America&rsquo;s most familiar and beloved songbirds. This discovery also provides insights into this species&rsquo; capacity to adapt to the challenges of climate change. The study, published today in&nbsp;<em>Nature Communications,&nbsp;</em>used genomic sequencing to successfully pinpoint eight genetic variants, or DNA mutations, largely responsible for the nearly threefold difference in body size observed across the song spa...

Scientists have unraveled the genetic underpinnings that account for the significant variation in body size among song sparrows