搜索结果: 1-15 共查到“理学 birds”相关记录53条 . 查询时间(0.062 秒)
Birds’ eye size reflects habitat and diet, may predict sensitivity to environmental change
birds visual environmental change deforestation
2021/8/10
A new study shows the eye size of birds can reveal broad patterns of their biology and behavior, including where they live, what they eat and how they hunt, providing a potential roadmap for future co...
How do birds breathe so efficiently? Looped airways facilitate air flows（图）
birds breathe efficiently Looped airways facilitate air flows
2021/4/9
Birds breathe with greater efficiency than humans because of the structure of their lungs --looped airways that facilitate air flows that go in one direction -- a team of researchers has found. The re...
In a desert seared by climate change, burrowers fare better than birds（图）
desert seared climate change burrowers fare birds
2021/3/5
In the arid Mojave Desert, small burrowing mammals such as the cactus mouse, the kangaroo rat and the white-tailed antelope squirrel are weathering the hotter, drier conditions triggered by climate ch...
Metallic blue fruits use fat to produce color and signal a treat for birds（图）
Metallic blue fruits produce color signal treat for birds
2020/8/21
Researchers have found that a common plant owes the dazzling blue color of its fruit to fat in its cellular structure, the first time this type of color production has been observed in nature.The plan...
Diversity plays a key role in maintaining the stability of plant and animal life. But it's difficult to scale up smaller experiments to understand how changes will impact larger ecosystems.A new study...
New study finds U.S. and Canada have lost more than 1 in 4 birds in past 50 years（图）
U.S. Canada lost birds past 50 years
2019/10/18
Since 1970, bird populations in the U.S. and Canada have declined by 29%, or almost 3 billion birds, signaling a widespread ecological crisis, a study published in the journal Science reveals. The res...
How can birds that weigh less than an AA battery live through the immense power of Atlantic hurricanes? A new study in Ecology Letters finds that some coastal birds survive because their populations c...
Using artificial intelligence to track birds' dark-of-night migrations（图）
artificial intelligence track birds dark-of-night migrations
2019/10/18
Every year during spring and fall migration, tens of millions of birds take flight at sunset and pass over our heads, unseen in the night sky.The National Weather Service has recorded the birds' migra...
Under the watchful eyes of five high-speed cameras, a small bird named Gary waits for the signal to fly. Diana Chin, a researcher at Stanford University and Gary's trainer, points her finger to a perc...
Scientists discover how birds navigate crosswinds（图）
Scientists birds navigate crosswinds
2019/10/23
While pilots rely on radio signals, advanced computations and other tools to keep them on course during strong crosswinds, birds can naturally navigate these demanding conditions -- in environments wi...
Scientists track the brain-skull transition from dinosaurs to birds（图）
Scientists brain-skull transition dinosaurs birds
2017/9/20
The dramatic, dinosaur-to-bird transition that occurred in reptiles millions of years ago was accompanied by profound changes in the skull roof of those animals — and holds important clues about the w...
Building a Better Alligator:Researchers Develop Advanced Three-Dimensional Models of Bite Data to Study Dinosaurs,Birds,Crocodiles
Better Alligator Advanced Three-Dimensional Models Bite Data Dinosaurs Birds Crocodiles
2017/7/21
The skulls of alligators protect their brains, eyes and sense organs while producing some of the most powerful bite forces in the animal kingdom. The ability to bite hard is critical for crocodilians ...
Birds of a Feather
Birds Feather
2017/7/21
Biologists have always been fascinated by the diversity and changeability of life on Earth and have attempted to answer a fundamental question: How do new species originate?Today, an implicit assumpti...
Fly-over states matter when understanding–and saving-migratory birds
Fly-over states matter saving-migratory birds
2017/3/30
Around the world, thousands of migratory animals travel hundreds or even thousands of miles each year. The journey of migratory animals is more important than their destination. Scientists use the end...
Feeding birds in your local park?If they're white ibises in Florida,think twice
Feeding birds local park ibises Florida
2016/2/23
The following is part 17 in a series on the NSF-NIH-USDA Ecology and Evolution of Infectious Diseases (EEID) Program. See parts: one, two, three, four, five, six, se...