60秒科学:Finches Seek Out Sick Dining Companions

Finches Seek Out Sick Dining Companions
A study in the journal Biology Letters finds that male finches prefer dining next to a sick bird despite the risk of infection, probably because the lethargic² companion is less likely to engage in food fights. Karen Hopkin reports

When you’re looking for a table in a crowded cafeteria, you probably give wide berth³ to the family that sounds like it’s sharing a big dish of whooping⁴ cough. Well, not if you’re a house finch¹, particularly a male. Because a study in the journal Biology Letters [by Karen M. Bouwman and Dana M. Hawley at Virginia Tech; see http://bit.ly/afHGw7] shows that male finches actually prefer feeding near males who are visibly ill.

Finches don’t get whooping cough. But they are susceptible⁵ to infection with something called Mycoplasma gallisepticum, a bug⁶ that leaves them lethargic and sporting a bad case of conjunctivitis, otherwise known as pinkeye. The disease is quite contagious⁷ and can be passed from one finch to another while dining beak⁸-to-beak. All the more reason, you’d think, for healthy birds to avoid sitting next to someone with crusty red peepers. Yet male house finches, when given a choice, opt⁹ to break breadcrumbs with males who are obviously under the weather.

Why risk catching¹⁰ a nasty infection when all you really want to catch is a quick bite? Because males infected with Mycoplasma tend to be less aggressive. So eating with the infirm means you’re more likely to wind up with seed in your beak than a beak in your eye.
 

1 finch   

n.雀科鸣禽(如燕雀，金丝雀等)

参考例句：

• This behaviour is commonly observed among several species of finch.这种行为常常可以在几种雀科鸣禽中看到。
• In Australia,it is predominantly called the Gouldian Finch.在澳大利亚，它主要还是被称之为胡锦雀。

2 lethargic   

adj.昏睡的，懒洋洋的

参考例句：

• He felt too miserable and lethargic to get dressed.他心情低落无精打采，完全没有心思穿衣整装。
• The hot weather made me feel lethargic.炎热的天气使我昏昏欲睡。

3 berth   

n.卧铺，停泊地，锚位；v.使停泊

参考例句：

• She booked a berth on the train from London to Aberdeen.她订了一张由伦敦开往阿伯丁的火车卧铺票。
• They took up a berth near the harbor.他们在港口附近找了个位置下锚。

4 whooping   

发嗬嗬声的，发咳声的

参考例句：

• Whooping cough is very prevalent just now. 百日咳正在广泛流行。
• Have you had your child vaccinated against whooping cough? 你给你的孩子打过百日咳疫苗了吗？

5 susceptible   

adj.过敏的，敏感的；易动感情的，易受感动的

参考例句：

• Children are more susceptible than adults.孩子比成人易受感动。
• We are all susceptible to advertising.我们都易受广告的影响。

6 bug   

n.虫子；故障；窃听器；vt.纠缠；装窃听器

参考例句：

• There is a bug in the system.系统出了故障。
• The bird caught a bug on the fly.那鸟在飞行中捉住了一只昆虫。

7 contagious   

adj.传染性的，有感染力的

参考例句：

• It's a highly contagious infection.这种病极易传染。
• He's got a contagious laugh.他的笑富有感染力。

8 beak   

n.鸟嘴，茶壶嘴，钩形鼻

参考例句：

• The bird had a worm in its beak.鸟儿嘴里叼着一条虫。
• This bird employs its beak as a weapon.这种鸟用嘴作武器。

9 opt   

vi.选择，决定做某事

参考例句：

• They opt for more holiday instead of more pay.他们选择了延长假期而不是增加工资。
• Will individual schools be given the right to opt out of the local school authority?各个学校可能有权选择退出地方教育局吗？

10 catching   

adj.易传染的，有魅力的，迷人的，接住

参考例句：

• There are those who think eczema is catching.有人就是认为湿疹会传染。
• Enthusiasm is very catching.热情非常富有感染力。