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1、www.readinga-Rattlers RattlersA Reading AZ Level R Leveled BookWord Count:1,505Visit www.readinga- for thousands of books and materials.Written by Robert CharlesLEVELED BOOK RWritten by Robert CharlesRattlersRattlersLevel R Leveled Book Learning AZWritten by Robert CharlesIllustrated by Cende HillAl
2、l rights reserved.www.readinga-Photo Credits:Front cover,back cover,title page:Corel Corporation;pages 4,8,9,10,11,13,14,15,16,17,18(bottom),19:Jupiterimages Corporation;page 5:DLILLC/Corbis;page 12(top):George Steinmetz/National Geographic Stock;page 12(bottom):Hemera Technologies/Jupiterimages Cor
3、poration;page 18(top):Courtesy of Gary M.Stolz/USFWS;page 22:Learning A-Z;page 23(top):iS and Aaron Photography;page 23(bottom):iS Shotwww.readinga-CorrelationLEVEL RN3030Fountas&PinnellReading RecoveryDRA2324Other things threaten the survival of rattlesnakes.Rattlesnakes like to sun themselves on w
4、arm roads.Cars and trucks kill many of these snakes.People also destroy rattlesnake habitats as they build larger cities and more highways.Some people are beginning to take action to help rattlesnakes survive.Many rattlesnake roundups have been banned or limited.Signs alert drivers to roads where ra
5、ttlesnakes may be sunning themselves.Snake habitats have been set aside and protected.If we respect these animals,they will not hurt us.And as we learn more about rattlesnakes,we understand why it is important to protect them.GLOSSARY caterpillar a snake motion in which the edgesof the snakes scales
6、 catch on the ground and pull the snakes body forward(p.12)cold-blooded having a body temperature that goes up and down with the temperature of the surroundings(p.7)fangs long,hollow,sharp teeth(p.9)habitat the natural environment of a plant or animal(p.6)hibernating spending the winter in a deep sl
7、eep(p.7)pit vipers snakes that have pits on their heads that detect heat(p.8)prey animals that other animals eat for food(p.8)serpentine a snake motion in which the snake moves its body in an S-shape,pushing itself forward where its body bends(p.11)sidewinding a snake motion in which the snake moves
8、 in a fast,strong S-shape,pushing its body sideways(p.12)venom poison that animals use to kill prey and defend themselves(p.9)Rattlers Level RWritten by Robert CharlesRattlersRattlersLevel R Leveled Book Learning AZWritten by Robert CharlesIllustrated by Cende HillAll rights reserved.www.readinga-Ph
9、oto Credits:Front cover,back cover,title page:Corel Corporation;pages 4,8,9,10,11,13,14,15,16,17,18(bottom),19:Jupiterimages Corporation;page 5:DLILLC/Corbis;page 12(top):George Steinmetz/National Geographic Stock;page 12(bottom):Hemera Technologies/Jupiterimages Corporation;page 18(top):Courtesy of
10、 Gary M.Stolz/USFWS;page 22:Learning A-Z;page 23(top):iS and Aaron Photography;page 23(bottom):iS Shotwww.readinga-CorrelationLEVEL RN3030Fountas&PinnellReading RecoveryDRA2324Other things threaten the survival of rattlesnakes.Rattlesnakes like to sun themselves on warm roads.Cars and trucks kill ma
11、ny of these snakes.People also destroy rattlesnake habitats as they build larger cities and more highways.Some people are beginning to take action to help rattlesnakes survive.Many rattlesnake roundups have been banned or limited.Signs alert drivers to roads where rattlesnakes may be sunning themsel
12、ves.Snake habitats have been set aside and protected.If we respect these animals,they will not hurt us.And as we learn more about rattlesnakes,we understand why it is important to protect them.GLOSSARY caterpillar a snake motion in which the edgesof the snakes scales catch on the ground and pull the
13、 snakes body forward(p.12)cold-blooded having a body temperature that goes up and down with the temperature of the surroundings(p.7)fangs long,hollow,sharp teeth(p.9)habitat the natural environment of a plant or animal(p.6)hibernating spending the winter in a deep sleep(p.7)pit vipers snakes that ha
14、ve pits on their heads that detect heat(p.8)prey animals that other animals eat for food(p.8)serpentine a snake motion in which the snake moves its body in an S-shape,pushing itself forward where its body bends(p.11)sidewinding a snake motion in which the snake moves in a fast,strong S-shape,pushing
15、 its body sideways(p.12)venom poison that animals use to kill prey and defend themselves(p.9)Rattlers Level R2122The rattlers futureThere are far fewer rattlers around today than when Columbus landed in the Americas.Because many people fear rattlers and do not understand the good they do,they often
16、needlessly kill them.Not long ago,rattlesnake roundups were popular.During these hunts,people captured all the snakes they could find.The snakes were killed and skinned.The meat was sold and the skins were made into belts,wallets,and purses.DO YOU KNOW?Antivenom,the medicine used to treat snakebites
17、,comes from horses.Doctors inject the horse with a little bit of snake venom.The horse is not hurt,but it builds up a chemical that stops the effects of the poison.Doctors collect this chemical,which also stops venoms effects in people and other animals.RATTLESNAKE SAFETY If you or someone you know
18、is bitten,follow these steps.Follow the same steps for your pet:1 Keep the victim calm.Panic will only makethe heart beat faster,carrying the venom through the body more quickly.2 Get to a doctor as quickly as possible,butdo not let the victim run or do any other exercise.If possible,have someone ca
19、rry the victim.3 Put a cool,wet cloth over the bite.Do notuse ice,since ice can cause frostbite.4 Tell the doctor or hospital workers what kind of snake you think may have bitten the victim.But do not try to catch the snake,kill it,or bring it to the hospital.The demand for beautiful snakeskin has c
20、aused the death of many rattlers.The inset photo shows the pattern of scales.Rattlers Level R34Table of Contents Introduction.4Where Rattlers Live .6How Rattlers Hunt .8How Rattlers Move.11Baby Rattlers .13A Rattlers Rattle .15Types of Rattlers .17Snakebite .19Rattlesnake Safety.20The Rattlers Futur
21、e .22Glossary .24Introduction While most snakes are harmless,there are a few that can strike with a deadly bite.Rattlesnakes,commonly known as rattlers,are some of the most feared of these deadly snakes.But before you get the wrong idea about rattlers,lets set the record straight.Snakes dont go arou
22、nd looking for someone to bite.In fact,most snakes,including rattlers,would rather avoid people.And also,most people who are bitten by rattlesnakes do not die from the bite.Resting rattlers like this one rarely bite.Rattlers Level R34Table of Contents Introduction.4Where Rattlers Live .6How Rattlers
23、 Hunt .8How Rattlers Move.11Baby Rattlers .13A Rattlers Rattle .15Types of Rattlers .17Snakebite .19Rattlesnake Safety.20The Rattlers Future .22Glossary .24Introduction While most snakes are harmless,there are a few that can strike with a deadly bite.Rattlesnakes,commonly known as rattlers,are some
24、of the most feared of these deadly snakes.But before you get the wrong idea about rattlers,lets set the record straight.Snakes dont go around looking for someone to bite.In fact,most snakes,including rattlers,would rather avoid people.And also,most people who are bitten by rattlesnakes do not die fr
25、om the bite.Resting rattlers like this one rarely bite.Rattlers Level R2122The rattlers futureThere are far fewer rattlers around today than when Columbus landed in the Americas.Because many people fear rattlers and do not understand the good they do,they often needlessly kill them.Not long ago,ratt
26、lesnake roundups were popular.During these hunts,people captured all the snakes they could find.The snakes were killed and skinned.The meat was sold and the skins were made into belts,wallets,and purses.DO YOU KNOW?Antivenom,the medicine used to treat snakebites,comes from horses.Doctors inject the
27、horse with a little bit of snake venom.The horse is not hurt,but it builds up a chemical that stops the effects of the poison.Doctors collect this chemical,which also stops venoms effects in people and other animals.RATTLESNAKE SAFETY If you or someone you know is bitten,follow these steps.Follow th
28、e same steps for your pet:1 Keep the victim calm.Panic will only makethe heart beat faster,carrying the venom through the body more quickly.2 Get to a doctor as quickly as possible,butdo not let the victim run or do any other exercise.If possible,have someone carry the victim.3 Put a cool,wet cloth
29、over the bite.Do notuse ice,since ice can cause frostbite.4 Tell the doctor or hospital workers what kind of snake you think may have bitten the victim.But do not try to catch the snake,kill it,or bring it to the hospital.The demand for beautiful snakeskin has caused the death of many rattlers.The i
30、nset photo shows the pattern of scales.Rattlers Level R1920snakebiteOther than when hunting,rattlers only bite in self-defense.Most people get bitten when they bother the snake or accidentally step on it.Often,a threatened rattler gives a“dry”bite with no venom.And even if the snake does inject veno
31、m,it usually injects a small amount.Rattlers arent trying to kill people or animals that threaten them.They only want to hurt the person or animal enough so that he or she will go away and keep away in the future.Most people who get bitten by rattlesnakes were trying to catch,tease,or kill the snake
32、.Rattlers are not dangerous if you follow these safety tips:1 Never bother a rattlesnake or other snake.Snakes are wild animals,and you should not try to catch or touch them.2 If you go into wilderness areas where snakesmay live,wear long pants and boots that cover your ankles.Snakes bite down low,a
33、nd a layer of clothing can block a bite.3 Keep your pets on leashes.Do not let yourdog get close to or chase after snakes.4 Do not stick your hands or feet under rocks,logs,or bushes where you cannot see.Snakes like to hide under things.5 If you hear a rattle,stop moving immediately.Calmly look arou
34、nd and try to spot the snake with your eyes.Back slowly away from the snake.Remember,rattlesnakes are trying to warn you with their rattlethey do not want to bite you if they dont have to.Pay attention to that warning.RATTLESNAKE SAFETYA rattler in a defensive postureRattlers Level R56You should als
35、o know that snakes have an important role to play among living creatures.Rattlers eat rodents such as rats and mice.Since many rodents carry diseases and destroy valuable crops and property,rattlesnakes help humans by keeping the number of rodents under control.So the next time you think bad things
36、about rattlesnakes,dont forget the good they do.where rattlers LIVEAll of the worlds rattlesnakes are found in North and South America.They live in almost every state of the United States,in every South American country,and throughout southern Canada.Their habitat A rattler eating a mouseMany specie
37、s of rattlesnakes live across North and South America.The numbers indicate the center of each territory.Rattlesnake Habitats 1.Eastern Diamondback Rattlesnake 2.Timber Rattlesnake 3.Eastern Massasauga Rattlesnake 4.Bandedrock Rattlesnake 5.Sidewinder 6.Western Diamondback Rattlesnake 7.Prairie Rattl
38、esnake 8.Pygmy Rattlesnake 9.Mexican West Coast Rattlesnake 10.South American Tropical Rattlesnake12345678910NorthAmericaSouthAmericaNRattlers Level R56You should also know that snakes have an important role to play among living creatures.Rattlers eat rodents such as rats and mice.Since many rodents
39、 carry diseases and destroy valuable crops and property,rattlesnakes help humans by keeping the number of rodents under control.So the next time you think bad things about rattlesnakes,dont forget the good they do.where rattlers LIVEAll of the worlds rattlesnakes are found in North and South America
40、.They live in almost every state of the United States,in every South American country,and throughout southern Canada.Their habitat A rattler eating a mouseMany species of rattlesnakes live across North and South America.The numbers indicate the center of each territory.Rattlesnake Habitats 1.Eastern
41、 Diamondback Rattlesnake 2.Timber Rattlesnake 3.Eastern Massasauga Rattlesnake 4.Bandedrock Rattlesnake 5.Sidewinder 6.Western Diamondback Rattlesnake 7.Prairie Rattlesnake 8.Pygmy Rattlesnake 9.Mexican West Coast Rattlesnake 10.South American Tropical Rattlesnake12345678910NorthAmericaSouthAmericaN
42、Rattlers Level R1920snakebiteOther than when hunting,rattlers only bite in self-defense.Most people get bitten when they bother the snake or accidentally step on it.Often,a threatened rattler gives a“dry”bite with no venom.And even if the snake does inject venom,it usually injects a small amount.Rat
43、tlers arent trying to kill people or animals that threaten them.They only want to hurt the person or animal enough so that he or she will go away and keep away in the future.Most people who get bitten by rattlesnakes were trying to catch,tease,or kill the snake.Rattlers are not dangerous if you foll
44、ow these safety tips:1 Never bother a rattlesnake or other snake.Snakes are wild animals,and you should not try to catch or touch them.2 If you go into wilderness areas where snakesmay live,wear long pants and boots that cover your ankles.Snakes bite down low,and a layer of clothing can block a bite
45、.3 Keep your pets on leashes.Do not let yourdog get close to or chase after snakes.4 Do not stick your hands or feet under rocks,logs,or bushes where you cannot see.Snakes like to hide under things.5 If you hear a rattle,stop moving immediately.Calmly look around and try to spot the snake with your
46、eyes.Back slowly away from the snake.Remember,rattlesnakes are trying to warn you with their rattlethey do not want to bite you if they dont have to.Pay attention to that warning.RATTLESNAKE SAFETYA rattler in a defensive postureRattlers Level R1718types of rattlersThere are more than 30 types of ra
47、ttlers.The largest are the eastern diamondbacks.They have been known to grow to almost 2.5 meters(8 ft).Western diamondbacks are slightly shorter,but they can be thicker and heavier than eastern diamondbacks.Most western diamondbacks grow from 1 to 1.5 meters(35 ft).Diamondbacks get their name from
48、the diamond-shaped pattern on their skin.Timber rattlesnakes can be found in many wooded parts of North America from southern Canada to northern Mexico.They are about 1.5 meters(45 ft)long.Other common rattlers include the sidewinders.They get their name because they move across the desert sand usin
49、g the sidewinder motion.Sidewinders are smaller than diamondbacks,usually less than 1 meter (3 ft)long.Smaller rattlesnakes include the banded rock and pygmy rattlers.How do you think these snakes got their names?The eastern diamondback has bold patterns.Banded rock rattlesnake(above);pygmy rattlesn
50、ake(below)Rattlers Level R78includes swamps,deserts,prairies,forests,and mountains.The greatest numbers of rattlesnakes are found in the deserts and dry areas of the southwestern United States and northern Mexico.Like all reptiles,rattlesnakes are cold-blooded.This means their body temperature goes