https://dxnest.com/yen-tinh-che/
https://dxnest.com/to-yen-sao/
During the spring and summer, colorful purple martins can be a wonderful sight in suburban backyards. Attracting these birds and maintaining a colony offers a rewarding conservation project for Izaak Walton League chapters, schools, Scouts or master naturalist programs. However, erecting and maintaining a martin house requires time, patience and vigilance. Keeping nesting boxes free from competition and predators is critical. Purple martins used to nest in natural tree hollows and cliff crevices throughout the United
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