为什么鸟蛋的形状差异很大？Birds’ eggs come in many different shapes and sizes. But have you ever wondered why... and the US. They found that birds with better flying abilities have “pointier (更尖的)” eggs than other birds ……

that those species of birds that fly better than others lay pointy eggs because their bodies are more...为什么鸟蛋的形状差异很大？ 词数 364 建议阅读时间 7分钟 测试见 IV版Birds’ eggs come in many different shapes and sizes ……

when they find one. There are vegetables and fruits in the eggs. Yummy! grammarfly(动词)飞行- Birds can...咦！这里有彩蛋！Many kids around the world love Easter (复活节). They hunt1 for Easter eggs on that day ……

’t raise young birds, either. They lay (下蛋) their eggs in other birds’ nests.How do they do...’ enemies (敌人). When other birds hear the sound, they become scared and fly away. The cuckoos then go ……

Can you help the baby birds out of thenest(鸟巢) so they can fly? ……

cats. Can you see them? They help the birds find food and their way around. Kiwis have whiskers (腮须), just like cats. Can you see them? They help the birds find food and their way around. We ……

to leave many birds with nowhere to stay, forcing them to fly around or stand on centuries-old trees. I... to stay, forcing them to fly around or stand on centuries-old trees. I can’t help but wonder ……

year. In the game, angry birds fight green pigs that steal (偷) the birds’ eggs. It is quite simple: shoot (射击) birds with a slingshot (弹弓) — the birds fall and hit the pigs — and you get your eggs back ……

Help the bunny find the eggs!Help the bunny find the eggs!   ……

takes us to Bird Island. Birds live happily on the island. They can’t fly. But they do not think... the bird eggs. Angry Birds get really angry. They want to find their eggs. What will they do? What ……

信不信由你
Can birds fly backwards (向后)? Only hummingbirds (蜂鸟) can. ……

Can birds fly backwards? Only hummingbirds (蜂鸟) can. ……

信不信由你
Bats (蝙蝠) can fly. Are they birds? No, they are mammals (哺乳动物). ……

Hummingbirds (蜂鸟) are the only birds in the world that can fly backward. ……

hummingbird lays (产) only two eggs at a time.Only mom bee hummingbirds look after (照顾) the eggs. Baby birds... are very good at flying. We can fly for twenty hours in the sky. We can fly forwards (向前). We can ……