Thursday, February 1, 2018

Yellowstone National Park (5-12)


[1. 簡介] [2. 旅遊建議/食宿交通] [3. Sightseeing] [4. Winter Activities] [5. Wildlife Watching] [6. Day Hiking] [7. Other Activities] [8. Who's Who in the Park] [9. More about the Park] [10. 感想]


5. Wildlife Watching

[5-1. Grizzly Bear at Dunraven Pass] [5-2. Black Bear Watching] [5-3. Wolf/Grizzly Bear/Coyote in Hayden Valley] [5-4. Wolf/Grizzly Bear in Lamar Valley] [5-5. Elk in Rut at Mammoth Hot Springs] [5-6. Coyote at Lower Geyser Basin] [5-7. Bighorn Sheep at Gardner Canyon] [5-8. Lamar Canyon Pack] [5-9. Pronghorn in Rut] [5-10. Red Fox] [5-11. Trumpeter Swan] [5-12. American Dipper] [5-13. White Wolf] [5-14. Violet-Green Swallow]

5-12. American Dipper

美洲河鳥,也就是American dipper,算是隻小小鳥,通常出現在湖或是河流,獵食所謂的aquatic insect。這鳥分布在北美西部的廣大區域,並不限於在Yellowstone。在公園裡,這是四季都看得到的鳥,不過我大都是在冬天看到他們,包括Firehole River、Yellowstone River與公園北邊Lamar Valley馬路旁的Soda Butte Creek。

冬天大部分的湖與河都結冰,只有地熱區比如Firehole River或是一些水流較湍急的地方很難結冰,也是可能看到這鳥與其他(水)鳥的地方。

IMG_9988 American Dipper, Yellowstone National Park
Figure 5-12.1: 在Iron Creek上的ㄧ隻dipper。

IMG_0013 American Dipper, Yellowstone National Park
Figure 5-12.2: 很少可以在這麼近的距離觀察dipper這鳥。

IMG_0034 American Dipper
Figure 5-12.3: 有時候會站到水流較湍急的地方。

IMG_0037 American Dipper, Yellowstone National Park
Figure 5-12.4: 鑽頭到水裡找東西吃。

IMG_0048 American Dipper, Yellowstone National Park
Figure 5-12.5: 另一個鑽頭到水裡的動作。

IMG_0022 American Dipper, Yellowstone National Park
Figure 5-12.6: 拍翅膀時產生的小水珠。

這次是在Black Sand Geyser Basin的Iron Creek看到這鳥,Iron Creek就是流過Cliff Geyser前的那條河。從Old Faithful沿著Castle Geyser與Morning Glory Pool的那條路走到這大概是2 miles,來回就是4 miles,說近不近,說遠不遠。我走到這當然不是為了要看鳥,不過既然這鳥如此合作,當然就順便一下。

這鳥顏色上並不討好,甚至很黯淡,但吸引人之處在於他的覓食行為。很多時候看到的是他在河邊走動與觀望,然後忽然整隻鑽到水裡,之後又回到岸邊。不過這次倒是較沒看到這典型的行為,這鳥花了不少時間走在岸邊尋找食物,也有一些時候站到河裡的石頭上,之後把頭鑽到水裡覓食。以這體型與水的流速,總覺得會被水沖走,但他一直是自我感覺良好專心地在拼經濟,水流一點都不困擾到他。

我也常在冬天Lamar Valley裡馬路邊的Soda Butte Creek看到這鳥,不過距離遠了很多,除非你有更好的長鏡頭,圖片的效果大都很有限。

Previous Next


[5-1. Grizzly Bear at Dunraven Pass] [5-2. Black Bear Watching] [5-3. Wolf/Grizzly Bear/Coyote in Hayden Valley] [5-4. Wolf/Grizzly Bear in Lamar Valley] [5-5. Elk in Rut at Mammoth Hot Springs] [5-6. Coyote at Lower Geyser Basin] [5-7. Bighorn Sheep at Gardner Canyon] [5-8. Lamar Canyon Pack] [5-9. Pronghorn in Rut] [5-10. Red Fox] [5-11. Trumpeter Swan] [5-12. American Dipper] [5-13. White Wolf] [5-14. Violet-Green Swallow]

[1. 簡介] [2. 旅遊建議/食宿交通] [3. Sightseeing] [4. Winter Activities] [5. Wildlife Watching] [6. Day Hiking] [7. Other Activities] [8. Who's Who in the Park] [9. More about the Park] [10. 感想]

2 comments:

ECSH said...

不知道有沒有sexual dimorphism? 頭兩張照片中鳥喙的顏色好像不太一樣?

itchiang(thor) said...

這六張都是同一隻dipper,我參考了一下Cornell Lab of Ornithology一張在Yellowstone拍的,看起來跟這幾張還蠻像的.這鳥有沒有sexual dimorphism我不清楚,也許程度很低或是較不明顯,畢竟很少在這種距離觀察到.