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https://dxnest.com/yen-tinh-ch....e-rut-long-uot-nguye
Swallows are an iconic bird, known for their dramatic, fluttering flight and hearty mud nests. But while their drab nests are a common sight in backyards and farm fields, few people realize how difficult it is for these birds to raise young. They face many challenges as they build and defend their mud nests, often in locations that can be both unsightly and hazardous for the birds themselves. Learn about these birds, and how they construct their heartsy homes, in this week's
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