Black swans swim together on the green screen and enjoy the beautiful scenery of Jinnan in spring. What is its life habit?

Recently, there are black swans walking together on the green screen, and Jinnan District is on fire. In fact, April is the most beautiful day in a year. Flowers bloom and fall, willows are graceful, and the love between green mountains and green waters is fragrant everywhere. April is beautiful and rich. April of love at first sight can enter April of poetry and painting. The poet Bai Juyi once wrote a poem: In April, the world is beautiful everywhere, and in April, the peach blossoms in the mountain temple. I want to find a place where my life is dying, but I don't know that it has been moved here. ?

Where is Jinnan District? Jinnan District is one of the four urban areas around Tianjin. Located in the southeast of Tianjin, facing the Bohai Sea, with its back to the urban area, radiating North China and guarding Gyeonggi. Has always been a battleground for military strategists. Moreover, Jinnan is a retreat from the sea, located on the south bank of Haihe River, facing the river and facing the sea (ancient name? A negative river with a sea? ), accompanied by the sea and the river, formed a unique traditional culture, namely Haihe culture.

As early as 20 18, the relevant departments began to plan Jinnan District as an ecological zone, east to Jinnan District, south to Jinnan District, west to the east line of Jingning Expressway and north to Jinnan District. It is about 20km long in the north-south direction and about15km wide in the east-west direction. It mainly involves eight towns, namely Xianshui Ancient Town, Shuangqiaohe Town, Gegu Town, Beizhakou Town, Xiaozhan Town, Balitai Town, xin zhuang zhen Town and Shuang Gang Town, with a total area of 330 square kilometers. Among them, the primary control area is 204.8 square kilometers, the secondary control area is 75.2 square kilometers, and the tertiary control area is 50.0 square kilometers. This time, the black swan accompanied the green curtain, which is the recognition of the ecological environment in Jinnan District.

Black swans are rarely seen, while white swans are often seen. Black swan and white swan are different in appearance at first. Black swan's feathers are black, while white swan's feathers are white. There are also differences in living habits: black swan is very easy to choose a mate, while white swan is just the opposite; In our impression, swans are lifelong companions, that is, they will die alone after the other half dies. In fact, the white swan is like this, while the black swan will look for the next partner after his other half dies. There is a difference between black swan and white swan in hatching cygnet: the hatching rate of black swan is very low, but the survival rate is strong, while the white swan is relatively weak in this respect.

(The pictures are all from the Internet and have been deleted. )