持续吸引大量的鸟类到同一地点对它们来说是有害的，尤其是那些在被其他鸟类粪便污染的土地上觅食的鸟类。
Attracting numbers of birds continually to the same spot can be harmful to them, particularly species that pick food from the ground contaminated by the droppings of other birds.
热带雨林中居住的不那么鲜艳的鸟类和动物，往往依赖于视觉以外的信号形式，尤其是长距离的信号。
Less colorful birds and animals that inhabit the rain forest tend to rely on forms of signaling other than the visual, particularly over long distances.
生活在雨林中、且色彩并不那么亮丽的鸟类和动物往往依赖于视觉信号以外的其他信号形式，尤其是在传递长途信号的情况下。
Less colorful birds and animals that inhabit the rain forest tend to rely on other forms of signaling other than the visual, particularly over long distances.
乌鸦科(鸦科)的鸟类尤其易感，但已在250多种死亡和濒临死亡的鸟类中检测出该病毒。
Members of the crow family (Corvidae) are particularly susceptible, but virus has been detected in dead and dying birds of more than 250 species.
尤其是，当这种物质被注射如鸟类翅膀下很薄的皮肤时能够产生蚊子叮咬一样的肿包。
In particular, when PHA is inserted beneath the thin skin of a bird's wing, it causes a swelling a bit like a mosquito bite.
跟哺乳动物和鸟类不同，爬行动物没有慢波睡眠，此种睡眠据信能增强记忆，尤其是增强那种与新任务相关的记忆。
Unlike mammals and birds, reptiles are unable to experience slow wave sleep, the type of sleep believed to be responsible for boosting memories, especially those connected to performing new tasks.
不过，该项目还旨在提高公众对野生鸟类及其需求的认识，尤其是在中国，不断扩大的城市、污染以及巨大的商业利益在威胁这些生物。
But the project was also intended to raise awareness of wild birds and their needs, especially in China, where expanding cities, pollution and commercial capture with huge nets threaten the creatures.
山和海尤其利于鸟儿辨识方向，以上几点原因就使这里成为鸟类迁徙的中途栖息地。
Sea and mountain are markers that make it easy for birds to recognize directions when they fly.? For this reason, this area has become a stopover for migratory birds.
百分之九十七的遇害鸟类属于鸣禽，其中莺科鸟数量尤其多。
Ninety-seven percent of all birds killed are songbirds, especially warblers.
通过这种方式，DDT在被禁止之前其含量已经很高，足以严重破坏北美许多鸟类的繁殖，尤其对于鹰和猫头鹰的破坏更为严重。
In this way, DDT before it was banned reached levels high enough to seriously disrupt the re production of many birds in North America, especially hawks, owls, and eagles.
墨西哥湾就像是美国东部鸟类的中央车站，尤其是密西西比飞航路线。
"The Gulf of Mexico is like Grand Central Station for the birds of the eastern United States and especially the Mississippi Flyway," said Audubon President Frank Gill.
墨西哥湾就像是美国东部鸟类的中央车站，尤其是密西西比飞航路线。
"The Gulf of Mexico is like Grand Central Station for the birds of the eastern United States and especially the Mississippi Flyway," said Audubon President Frank Gill.
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