Fun Facts About Hummingbirds
世界上最小的鳥——— 蜂鳥（二）
https://www.thespruce.com/fun-facts-about-hummingbirds-387106
2019-06-20
1）There are more than 325 unique hummingbird species in the world. Only eight species regularly breed in the United States, though up to two dozen species may visit the country or be reported as regular vagrants. The rest of the hummingbirds are primarily tropical species and do not regularly migrate. They are found in Central and South America as well as throughout the Caribbean.
全世界有325種以上不同類型的蜂鳥。只有8種在美國定期繁殖，但有24種蜂鳥可能來美國轉轉或被稱之為“候鳥流浪漢”。餘下的蜂鳥主要是熱帶物種，不會定期遷徙，發現於中美洲、南美洲、以及所有加勒比海地區。
vagrant：英 [ˈveɪɡrənt] 美 [ˈveɪɡrənt] (formal or law 律) a person who has no home or job, especially one who begs (= asks for money) from people無業遊民；流浪者；（尤指）乞丐
the Caribbean：the region consisting of the Caribbean Sea and its islands, including the West Indies, and the coasts which surround it 加勒比海地區（指加勒比海及其島嶼，包括西印度群島及其周圍海岸）
2）A hummingbird’s brilliant throat color is not caused by feather pigmentation, but rather by iridescence in the arrangement of the feathers. Light level, moisture, angle of viewing, wear and tear and other factors all influence just how bright and colorful the throat may appear.
蜂鳥明豔的喉部顏色不是羽毛天然顏色引起的，而是羽毛排列的虹彩效果。 光線、溼度、看的角度、磨損和其他因素
