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 ...
4.There are six types of kiwi, and all six are threatened. Two are ‘critically endangered’ because they have populations of less than 250 mature birds. Two are ‘endangered’ meaning that it is estimated that within three generations their numbers will have declined by 50%. The other two...
Grounded birds were not as rareas they appear to be today. In fact, flightless owls, ibis, woodpeckers, finches and many more were a common part of the landscape. They were well and truly alive, but are now sadly gone. There was one bird that outlived them all. True to its name, t...
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,...
Like kangaroos,emusare from Australia. They are flightless birds similar in looks and characteristics to ostriches, though they average about 10 inches shorter in height. Unlike ostriches, emus cannot walk backwards; however, it's not known why. Emus are known for their fast sprinting and long ...
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. ...
Most often, flightlessness evolves after a bird species flies to an island where there are no predators. As long as these predator-free circumstances last, the birds thrive, but they are vulnerable to changes in their environment. For instance, ...
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...
where there are no predators.As long as these predator-free circumstances last,the birds thrive, but they are vulnerableto changes in their environment.For instance, human settlers bring dogs,cats, and stowaway rodents to islands.These animals often prey on flightless birdsand can drive them to ...