Black Swans are known for their striking black plumage and bright red or orange beak.
黑天鹅以其显著的黑色羽毛和明亮的红色或橘红色鸟喙而闻名。
They are native to Australia and have been introduced to various parts of the world including Spain, the UK, and parts of Western Europe, as well as China and Japan.
黑天鹅原产于澳大利亚,后来被引进至世界其他地区,包括西班牙、英国、西欧部分地区,以及中国和日本。
Black Swans are monogamous and usually mate for life.
黑天鹅是一夫一妻制的鸟类,通常终身相伴。
They are almost entirely herbivorous, feeding on a variety of aquatic plants and algae.
它们的食物几乎完全是植物,包括各种水生植物和藻类。
The Black Swan is known for its unique mating rituals, including a 'triumph ceremony' that strengthens the pair bond and asserts territory.
黑天鹅以其独特的求偶仪式而知名,包括一种“凯旋仪式”,这有助于加强配偶间的关系并宣示领地。
The 'triumph ceremony' involves the male swan approaching the female with his wings and beak near, calling repeatedly.
“凯旋仪式”包括雄天鹅将翅膀和鸟喙靠近雌天鹅,反复呼叫。
The female responds with a call, and they alternate heads in an upright position before stretching their necks upward and raising their beaks at a 45-degree angle, then circle around.
雌鸟以呼叫回应,然后它们交替以直立的姿势抬起头部,之后伸展脖子并向上抬起鸟喙至45度角,然后绕圈游动。
These rituals are primarily initiated by the male and increase in frequency when there are more swans around.
这些仪式主要由雄性发起,当周围有更多的天鹅时,其频率会增加。
请注意,以上信息结合了搜索结果中的多个来源,特别是百度百科和搜狗百科的资料。