越冬天鹅变多了

Core Points - The article highlights the arrival of 71 swans at the Laohuwei Wetland in Dalian's Lushunkou District for wintering, an increase from 35 swans last year [2] - The wetland is noted for its rich food supply and ongoing ecological improvements, which have contributed to the increase in the swan population [2] Summary by Categories - Population Growth - The number of swans wintering at the wetland has risen from 35 to 71 [2] - Ecological Factors - The area is recognized as a rich food source due to its location at the estuary [2] - Continuous ecological improvements and regular artificial feeding have supported the swan population increase [2]