news on animals l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
News on Animals PowerPoint Presentation
Download Presentation
News on Animals

Loading in 2 Seconds...

play fullscreen
1 / 22

News on Animals - PowerPoint PPT Presentation


  • 246 Views
  • Uploaded on

News on Animals By Cathy Chang Snakes Starting Questions What are the characteristics of snakes? Do you see them as essential to the environment or just dangerous reptiles? How is the image of snakes usually used in places like books, movies, etc.?

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'News on Animals' - Patman


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
news on animals

News on Animals

By Cathy Chang

starting questions
Starting Questions
  • What are the characteristics of snakes?
  • Do you see them as essential to the environment or just dangerous reptiles?
  • How is the image of snakes usually used in places like books, movies, etc.?
snake fang evolution mystery solved major surprise
“Snake-Fang Evolution Mystery Solved -- ‘Major Surprise’”

The diverse and deadly array of venomous snakes living today all arose from a single fanged ancestor, a new study suggests.

Vipers, cobras, and other snakes that have fangs at the fronts of their jaws surprisingly begin life like snakes that have poisonous fangs at the back of their jaws, said a team led by Freek Vonk of Leiden University in the Netherlands.

The discovery suggests venomous fangs--the lethal evolutionary invention that led to snakes becoming so successful--arose only once about 60 million years ago.

The origins of venom-injecting snakes have long been the source of scientific controversy, because the contrasting fang positions of diverse snake groups pointed to independent evolution.

But a study of the embryos of eight front- and rear-fanged species has found that fangs always first appear at the back of the upper jaw before migrating forward in vipers and cobras.

This previously unidentified transformation in the unborn young occurs due to "rapid growth of some parts of the upper jaw relative to the others," Vonk explained. (Source)

vocabulary
Diverse 多種多樣的;多變化的

Array 一系列;大量

Venomous分泌毒液的

Fanged 有尖牙的

Vipers 奎蛇

Cobras 眼鏡蛇

Jaws 頜;顎;下頜,下巴

Poisonous 有毒的

Lethal 致命的

Evolutionary 進化的

Invention 發明,創造

Origins 起源;由來

Venom-injecting 注射毒液

Contrasting 形成鮮明對比的

Independent 獨立的

Embryos 胚胎

Migrating 遷移;移居

Transformation 變化;轉變

Relative to 成比例

Vocabulary
starting questions7
Starting Questions
  • Have you ever seen real lemurs?
  • What are some characteristics of lemurs?
  • What is your reaction when you see these mammals?
cross dressing lemurs appear male to avoid conflict
“‘Cross Dressing’ Lemurs Appear Male to Avoid Conflict”

Young female red-fronted lemurs in Madagascaradopt male coloration to dupe their aggressive female group-mates, a new study found.

These "cross dressing" primates thus avoid the wrath of older females, which would attack them to reduce sexual competition.

All red-fronted lemurs are born with the same grayish brown fur and rusty-red crowns that distinguish adult males.

At 7 to 17 weeks later, females' coats change to a cinnamon hue, and their crowns become white.

"We knew from our longer-term observations that there was a lot of female aggression in red-fronted lemurs," said study author Claudia Fichtel of the University of Göttingen's German Primate Center.

"Females compete fiercely over limited breeding opportunities, and we wanted to know if hiding femininity was a way to avoid being attacked," Fitchtel said. (Source)

vocabulary9
Madagascar 馬達加斯加

Adopt 採取

Coloration 天然色

Dupe 欺騙

Aggressive 好鬥的,挑釁的

Mates 同伴

Primates 靈長類

Wrath 憤怒,狂怒

Crowns 頭頂;頭

Coats 皮毛

Cinnamon 淺紅褐色

Hue 色調,色澤

Breeding 生育,生殖

Femininity 女子氣質

Vocabulary
starting questions11
Starting Questions
  • What are the characteristics of bees?
  • What are the advantages of having bees in our environment? Disadvantages?
  • Have you ever been stung by a bee?
bees enlisted to attack crows in tokyo
“Bees Enlisted to Attack Crows in Tokyo”

After years of being attacked by crows, a colony of seabirdsnesting in Tokyo is getting an unlikely ally: the tiny honeybee.

Conservationists hope bees will repel the crows, based on the insects' tendency to attack anything dark-colored that approaches their hives.

This year beehives from rural areas were relocated to the top of a large water-treatment facility near Tokyo's international airport, where as many as 4,000 birds known as little terns nest after a long migration from Australia, New Zealand, and Papua New Guinea.

Although they are not endangered internationally, little terns are listed as "vulnerable" in Japan's Red Data Book of threatened species.

That's because the terns' nesting sites in the country are being destroyed by construction work and other human activities, so the birds are considered potentially at risk in the future.

The terns near the airport have long been victims of Tokyo's crows.

(Source)

vocabulary13
Crows 烏鴉

Colony 集群;群體

Seabirds 海鳥

Nesting 巢;窩;穴

Ally 伙伴,助手

Conservationists 天然資源保護論者

Repel 擊退;驅除

Tendency 傾向

Hives 蜂房;蜂巢

Rural 鄉下

Relocated 重新安置

Terns 燕鷗

Endangered 快要絕種的

Potentially 潛在地;可能地

Vocabulary
starting questions15
Starting Questions
  • What are some of the characteristics of chameleons?
  • Why do some people like to raise them as pets?
record breaking chameleons live only a few months
“Record-Breaking Chameleons Live Only a Few Months”

Members of a rare chameleon species all hatch in the same month, then die only four to five months later--making them the shortest-lived four-limbedvertebrates, a new study says.

Labord's chameleon had been identified in 1872 in the arid southwest of the island of Madagascar off the east coast of Africa. But it wasn't until 2003 that a zoologist noticed there was something strange about this particularspecies.

"It was just bizarre, because I could find only adults and no juveniles whatsoever," said study co-author Kristopher Karsten of Oklahoma State University.

"So I thought, Well, either my eye isn't trained very well to find these juveniles, or they're not there. And if they're not there, maybe that means that every one is the same age and they're an annual species.

"After studying the chameleons for three more seasons, Karsten and his colleagues were certain that the entire population of Labord's chameleon (Furcifer labordi)turns over every year.

(Source)

vocabulary17
Rare 稀有的,罕見的

Chameleon 變色龍

Hatch 孵出

Limb 肢;臂;腳;翼

Vertebrates 脊椎動物

Arid 乾旱的;乾燥的

Zoologist 動物學家

Particular 特殊的;特定的

Species 種類

Bizarre 異乎尋常的

Juveniles 少年的

Annual 一年一次的

Turns over 更換

Vocabulary
starting questions19
Starting Questions
  • What are some characteristics of birds?
  • What species of birds can you name?
  • Do they make good pets?
migrating birds understand foreign languages
“Migrating Birds Understand ‘Foreign Languages’”

Like avid travelers picking up local languages, migrating birds appear to learn and understand the common calls of unrelated bird species that they encounter during their long journeys, new research reveals.

Birds that remain in one location throughout the year have no difficulty identifying predators, such as hawks, ferrets, and snakes.

Migrators, however, constantly face the threat of encountering predators in their travels that they do not immediately recognize as dangerous.

Some ecologists had previously suggested that long-distance travelers pick up cues from local species to obtain information on unfamiliar predators, but evidence for this theory has been thin.

To explore the possibility, researchers at Queen's University in Ontario, Canada, played predator warning calls made by both local and foreign species to birds passing through Belize on long migrations as well as to local birds and monitored their reactions.

(Source)

vocabulary21
Avid 勁頭十足的

Common 普通的;常見的

Encounter 遇到

Predators 掠奪者

Ferrets 雪貂,白鼬

Ecologists 生態學者

Cues 暗示,信號;線索

Local 地方性的;當地的,本地的

Obtain 得到,獲得

Unfamiliar 不熟悉的;不常見的

Evidence 證據

Theory 理論;原理

Monitor 監視

Reactions 反應

Vocabulary
reference
Reference

“Animal News.” National Geographic. 1 Aug 2008. <http://news.nationalgeographic.

com/news/animals_05.html>.