每次跑步都看见这只未成年的大蓝鹭,从春天到现在,要么发呆,要么顾影自怜,但它是越来越胖。我就纳闷:这个pond是大,但毕竟是人造的,有鱼吗?还上网查了查: Man-made ponds are often used for agricultural or irrigation purposes. Natural ponds often serve a wide range of animal species. However, not all ponds you see have fish in them as normally expected. There are a few subtle and no so subtle ways to find out if fish are in the water.