According to paragraph 4, why have species of flightless and ground-nesting birds become so numerous on Oceanic islands? A. They have no predators on the islands. B. They were some of the strongest species to arrive on the islands. C. They live closer to their food sources than other ...
the birds thrive, but they are vulnerable to changes in their environment. For instance, human settlers bring dogs, cats, and stowaway rodents to islands. These animals often prey on flightless birds and can drive them to
These animals often prey on flightless birds and can drive them to extinction. In New Zealand, stoats introduced by European settlers have threatened many native species of flightless bird. Some have gone extinct while others are endangered. 更多关于 circumstances 的用法 ← 请点击这里 更多关于 ...
flightless birds and can drive them to extinction. in new zealand, stoats introduced by european settlers have threatened many native species of flightless bird. some have gone extinct while others are endangered. so, in spite of the energy-saving ...
The 25 Biggest Birds in the World 1. Common Ostrich (Struthio camelus) TheCommon Ostrichis theworld’s largest bird, reaching heights of up to 9 feet (2.7 meters). Native to Africa, they are found primarily in grasslands, savannahs, and shrublands. These flightless giants can weigh as much...
Flightless birds are birds which cannot fly. They rely on their ability to run or swim, and have evolved from their flying ancestors. There are about 60 species living today, the best known being theostrich, emu, cassowary, rhea, kiwi, and penguin. ...
Some island hotspots where flightless birds were prevalent include New Zealand, with 26 species, and Hawaii, with 23 species, all of which are now extinct. Lacking a crucial defense strategy, such as flight, ratites died out due to easy and opportunistic predation. Human hunters, along with ra...
have threatened many native species of flightless bird.Some have gone extinct while others are endangered.So in spite of the energy-saving advantagesof flightlessness, many flightless bird species haveonly a short run before going the way of the dodo.But a few flightless birds have survived on...
By the time of theK/T Extinction Event, 65 million years ago, many of these theropods had completed the transition into true birds; in fact, there's even evidence that some of these birds had enough time to become "secondarily flightless" like modern penguins and chickens. While the frigid...
Fireflies taste horrible to predators like birds and mice. When eaten, they release a bitter defensive chemical that helps to keep predators away. All fireflies are bioluminescent as larvae (which is why the larvae are often called glowworms), but not all of them shine as adults. The fireflie...