https://dxnest.com/to-yen-sao/
https://dxnest.com/yen-tinh-che/
Whether a bird’s nest is woven from twigs and branches, or stuffed with grass and sticks and lined with feathers, it provides a unique insight into the life of a bird. Birds use their nests to protect eggs and incubating parents, provide shelter for fledgling chicks, or serve as a resting place between flights. But not all nests are created equal—in fact, some are so distinctive that they can be attributed to individual birds in a given study group or family. In the case of house sparrows, for example, nest-building