MANY birds?feathers (羽毛) weigh more than their bones. ……

火烈鸟为什么是粉色的？Flamingos are not born pink. Baby flamingos are gray and white. The birds eat shrimp (虾). Over time, it makes their feathers (羽毛) become pink. TEENS ……

their wings and feathers were quite different from those of birds today. Looking closely at the fossils... of feathers never stopped. Birds developed wings that included a layer of long feathers covered with short ……

作用) with melanin (黑色素) in birds’ bodies. Melanin is the pigment (色素) that makes feathers black, brown...化合物). These toxic compounds are more likely to be stored in the feathers of birds. Surprisingly, this can give ……

interact with melanin (黑色素) in birds’ bodies. Melanin is the pigment (色素) that makes feathers black, brown... compounds are more likely to be stored in the feathers of birds. Surprisingly, this can give them ……

. QIANTUFlamingos (火烈鸟) are known for their beautifully colored feathers (羽毛) which help the birds... a color-carrying serum (血清). The birds then rub their serum-coated cheeks on their feathers ……

to produce a color-carrying serum (浆液). The birds then rub the serum on their feathers and sway (摇晃...). The birds then rub the serum on their feathers and sway (摇晃) their necks to make sure the color ……

for granted about how birds took wing.Just as feathers came before birds, so perhaps did true wings and some... — a creature that could be a long-sought evolutionary link between dinosaurs and the first true birds ……

. They have black feathers (羽毛) and look like small crows. Why is it so easy for the birds to pluck...聪明寒鸦拔鹿毛筑巢。聪明寒鸦拔鹿毛筑巢。Most birds make their nests (巢) out of twigs (小树枝). But the jackdaw  (寒鸦 ……

in the seas or flew (before birds)! There were some flying and swimming animals then but they were closely related (相关的) to dinosaurs. Some meat-eating dinosaurs developed feathers, and became birds ……

美丽鸳鸯赢得美国人的心。Chinese people love mandarin ducks (鸳鸯). They are beautiful and faithful (忠贞的) birds. These birds are almost only found in East Asia. But a male (雄性的) mandarin duck recently won ……

birds. They do nature’s dirty work — eating dead animals. Yuck! What’s worse, these birds look pretty ugly. Vultures have thick feathers on their bodies but few feathers ……

The bones of a pigeon weigh less than its feathers. ……

care of the baby birds. The Puteketeke bird also eats its own feathers (羽毛) and then spits (吐) them out... birds. The Puteketeke bird also eats its own feathers (羽毛) and then spits (吐) them out. That’s why some ……

Yin Peixin takes a photo with birds.  PROVIDED TO TEENS  A fun trip to the world of birdsA fun trip to the world of birdsA fun trip to the world of birds徜徉在“鸟的世界”徜徉在“鸟的 ……