[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-415256-105":59,"doc-detail-415256-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","birds-questions-and-answers","Birds - Questions and Answers","","Collection of bird facts presented as reader-friendly questions and answers, covering anatomy, flight, migration, nesting, feeding, senses, and species behavior. Explains how bird toes and tendons support gripping during sleep, why wing skeleton structures work, and how wing shape creates lift and enables energy-saving V-formations. Includes topics such as beaks changing with diet, hollow bones and airflow, fastest birds, and notable birds in folklore and endangered species study.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":15,"@type":76,"position":81},"https://docshare.wps.com/document/literature/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/birds-questions-and-answers/415256/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/birds-questions-and-answers/415256.png","ImageObject",300,407,{"name":92,"@type":93},"Anna Hans","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-28",true,{"@type":102,"interactionType":103,"userInteractionCount":44},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How do birds grip a branch while they sleep?","Question",{"text":112,"@type":113},"Tendons behind the ankle joint bend when the bird sits down, automatically clenching the toes around the twig. No muscle power is needed for the grip, so the bird can sleep safely.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Why do birds have wing shapes that help them stay in the air?",{"text":117,"@type":113},"The raised upper surface forces air above the wing to move faster, creating lower pressure than the air underneath. This higher pressure under the wing pushes the bird upward as it moves through the air.",{"name":119,"@type":110,"acceptedAnswer":120},"Can a bird change the shape of its beak?",{"text":121,"@type":113},"Yes. For example, an oystercatcher’s beak changes from short and blunt when eating cockles and mussels to long and narrow when its diet shifts to worms and other soft prey.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},415256,1790803969,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":14,"category_name":15,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":44,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":36,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},5909892332657,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","QU ESTIONS A ND AN SWERS  \nBDS  \nOver 100 questions and answersgs you want to know  \nWhich birdscan seebackwards?  \nWhich birdescaped toMalta?How does ahummingbirdhover?Written by Malcolm Penny and 1llustratedby Michael Posen  \n,  \nBirds  \nThis is a Parragon BookThis edition published in 2002ParragonQueen Street House4 Queen StreetBath BAi IHE,UKCopyright Parragon 2000  \nAll rights reserved.No part of this publication maybe reproduced,stored in a retrieval system ortransmitted,in any form or by any means,electronic,mechanical,photocopying recording or otherwise,without the prior permission of the copyrightholders.  \nHardback:ISBN 0-75256-958-9Paperback:ISBN 0-75257-072-2Printed in ChinaProduced byMonkey Puzzle Media LtdGissing's FarmFressingfieldSuffolk IP2I 5SHUKCover design:Design Principals  \nContents  \n4 Beaks,bones,wings,and feet6 Flight8 Migration10 Nests and eggs12 Raising a family  \n14.Singing and courtship16 Getting food18 Feathers20 Senses22 Birds that can't fly24 Endangered birds26 Studying birds28 Birds and animals30 Birds in folklore32 Index  \nHow many toes dobirds have?  \nTwo,three or four.A typicalperching bird has three pointingforward,and one back;birds thatrun on hard ground have onlythree,all pointing forward.  \nOstriches have only two toes,shaped rather like the hoof of anantelope.Woodpeckers have twotoes pointing forward and twoback;owls can turn their fourthtoe either forward or backward.for perching on a branch,or to geta better grip on prey.Swifts haveall four toes pointing forwards.  \nES,THREE OF THEM.THE FIRST,THETHUMB,SUPPORTS A SMALL BUT  \nimportant part of the wing called the alula,or bastard wingthe second and third support the main fight feathers.  \n# Why don't birds fall off abranch when they go tosleep?\n\nTendons,from the tips of the toes,pass behind the ankle joint.Thisjoint is bent when the bird sitsdown,so the toes areautomatically clenched round thetwig it is standing on.No musclepower is involved in this grip,sothe bird can sleep,without dangerof faling.  \n# The skeleton of a bird's wing\n\nWhy do birds'knees bend backwards?  \nThey don't.What looks like the bird's knee is in fact its ankle,and below itis an extended foot bone,leading to the toes.Its real knee is usuallyhidden by feathers.  \n# Which bird has the longest wings?\n\nThe wandering albatross has a wingspan-the distance from one wingtip  \nto the other;when the wings are stretched out -of more than 9 feet.The  \nWhat is a wishbone?  \nlongest ever measured was a male with a wingspan of 5 feet (3.45 m);Sometimes called thefemales are usually smaller\"merrythought,\"the wishbone iscreated by the bird's collarbones  \nFOR,CATCHING AND TEARING THEIRPREY.HAWKS,EAGLES,AND VULTURES,but also owls and shrikes,need to be able to take a firmgrip on struggling prey animals,and then pull them apart toeat them.The edges of an eagle's beak act like a pair ofscissors,to cut through skin and flesh.Gulls have a sharphook at the tip of their bill to hold on to slipperyfish or squid.  \n# Can a bird change the shapeof its beak?\n\nYes!An oystercatcher's beakchanges in a few weeks,from shortand blunt while it is eating cocklesand mussels,to long and narrowwhen its diet changes to wormsand other soft prey.  \n# Why are bird bones filledwith air?\n\nThe long bones of birds are liketubes,often with criss-crossinginside,to make them stronger fortheir weight.Not all birds haveequally hollow bones:those thatdive into water like gannets,terns,and kingfishers,and those that flyvery fast,like swifts and somewaders,have less air in theirlong bones.  \n# What is the world'sfastest bird?\n\nWhy do geese flyin aV?  \nWhat keeps a bird upin the air?  \nThe shape of its wings.The uppersurface is raised in a curve,so thatair traveling above it has to movefaster,than air moving under thewing.Air moving faster is at alower pressure than slower air,sothe higher pressure under thewing pushes it upwards,as itmoves through the air.The firsthumans to discover how this\"aerofoil section\"works wer","cbCaig8MFT4EVTt1","https://ap.wps.com/l/cbCaig8MFT4EVTt1","pdf",2387596,"English","# Contents\n## Beaks, bones, wings, and feet\n## Flight\n## Migration\n## Nests and eggs\n## Raising a family\n## Singing and courtship\n## Getting food\n## Feathers\n## Senses\n## Birds that can't fly\n## Endangered birds\n## Studying birds\n## Birds and animals\n## Birds in folklore\n## Index","[{\"question\":\"How do birds grip a branch while they sleep?\",\"answer\":\"Tendons behind the ankle joint bend when the bird sits down, automatically clenching the toes around the twig. No muscle power is needed for the grip, so the bird can sleep safely.\"},{\"question\":\"Why do birds have wing shapes that help them stay in the air?\",\"answer\":\"The raised upper surface forces air above the wing to move faster, creating lower pressure than the air underneath. This higher pressure under the wing pushes the bird upward as it moves through the air.\"},{\"question\":\"Can a bird change the shape of its beak?\",\"answer\":\"Yes. For example, an oystercatcher’s beak changes from short and blunt when eating cockles and mussels to long and narrow when its diet shifts to worms and other soft prey.\"}]","Birds - Questions and Answers | PDF",1790600693,62]