Golden eagle

Eagles in Trouble Again

A study published in Science in February found that North American eagles are being seriously impacted by lead poisoning. Up to 50 percent of the birds sampled had high levels of lead in their organs, enough to slow population growth by 3.8 percent in Bald eagles and 0.8 percent in Golden eagles. The Bald eagle […]

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Song Sparrow

Song Sparrows Remember

A study published in January found that male Song sparrows sing a repertoire of up to 12 two-second songs in sets lasting about 30 minutes – repeating a single song many times in a row within each set. During the next set, the males repeat the same 12 songs, but this time, vary the length

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