[{"data":1,"prerenderedAt":205},["ShallowReactive",2],{"glossary_en:\u002Fslovar\u002Fpereletnye-ptitsy":3,"alt-locale:glossary_en:\u002Fslovar\u002Fpereletnye-ptitsy":105,"section-listing:glossary_en:\u002Fslovar":106,"section-listing:disabled":200,"related-covers:en:\u002Fslovar\u002Fmigraciya-ptic|\u002Fslovar\u002Fosedlye-ptitsy|\u002Fslovar\u002Fproletnye-ptitsy":201},{"id":4,"title":5,"body":6,"coverImage":68,"description":69,"extension":70,"faq":71,"imagePrompt":78,"meta":79,"navigation":80,"order":81,"pageType":82,"path":83,"publishedAt":84,"readingMinutes":85,"relatedLinks":86,"seo":99,"sitemap":102,"stem":103,"tags":81,"updatedAt":81,"__hash__":104},"glossary_en\u002Fslovar\u002Fpereletnye-ptitsy.md","Migratory Birds",{"type":7,"value":8,"toc":62},"minimark",[9,14,34,47,51,59],[10,11,13],"h2",{"id":12},"definition","Definition",[15,16,17,18,22,23,27,28,33],"p",{},"A ",[19,20,21],"strong",{},"migratory bird"," is a species (or population within a species) that breeds in one region and spends the non-breeding season in a different, often distant, region, moving between the two on a predictable annual schedule. On a Bird Atlas species page, this shows up as a ",[24,25,26],"code",{},"season"," field listing the months the bird is present to breed — for example, the ",[29,30,32],"a",{"href":31},"\u002Fen\u002Fvidy-ptic\u002Fvidy\u002Fderevenskaya-lastochka","barn swallow"," is a classic long-distance migrant, breeding across Eurasia in summer and wintering in sub-Saharan Africa.",[15,35,36,37,41,42,46],{},"Migratory status is not fixed at the species level everywhere: the same species can be migratory in one part of its range and ",[29,38,40],{"href":39},"\u002Fen\u002Fslovar\u002Fosedlye-ptitsy","resident"," in another. The ",[29,43,45],{"href":44},"\u002Fen\u002Fvidy-ptic\u002Fvidy\u002Fobyknovennaya-pustelga","common kestrel",", for instance, migrates from central and northern Russia but stays put year-round in milder parts of Western and Southern Europe, since the birds there face no seasonal food shortage severe enough to force a move.",[10,48,50],{"id":49},"recognizing-migratory-species-in-the-field","Recognizing migratory species in the field",[15,52,53,54,58],{},"Migratory birds tend to show a few practical field signs: they appear in large numbers over a short window (arrival in spring, departure in autumn), they often travel and stage in flocks even if solitary during the breeding season, and their numbers at a site can swing from abundant to entirely absent between seasons. The ",[29,55,57],{"href":56},"\u002Fen\u002Fvidy-ptic\u002Fvidy\u002Fobyknovennaya-kukushka","common cuckoo"," is a useful example — vocal and conspicuous through late spring and summer, then essentially silent and gone from Russian forests by August, having already begun its return journey to Africa well before the birds it parasitized have even finished raising its offspring.",[15,60,61],{},"Because migratory timing is driven by day length and food supply rather than a fixed calendar date, arrival and departure windows can shift by a week or two between years, which is why species pages describe season as an approximate range rather than exact dates.",{"title":63,"searchDepth":64,"depth":64,"links":65},"",2,[66,67],{"id":12,"depth":64,"text":13},{"id":49,"depth":64,"text":50},"\u002Fimages\u002Fslovar\u002Fpereletnye-ptitsy.png","Migratory birds leave their breeding range for a separate wintering range on a predictable seasonal schedule, returning to breed in the same area each spring.","md",[72,75],{"q":73,"a":74},"Do migratory birds return to the exact same nest site?","Many do. Site fidelity is strong in species like the barn swallow and white stork, with individually ringed birds recorded returning to the same barn, chimney, or nest platform in consecutive years, sometimes for a decade or more, provided the site remains intact and undisturbed.",{"q":76,"a":77},"What's the difference between a migratory bird and a passage migrant?","A migratory bird breeds in one region covered by the atlas and winters in another, so it is present as a breeder for part of the year. A passage migrant only passes through the same region briefly while traveling between a breeding range and a wintering range that both lie elsewhere — see the passage migrants entry for details.","Photorealistic wildlife photo, a flock of Hirundo rustica barn swallows perched shoulder to shoulder along an electrical wire against a clear late-September sky, several individuals mid-preen, one bird launching into flight with wings blurred, soft-focus autumn treeline below, warm low-angle evening light from camera-left, 16:9",{},true,null,"glossary","\u002Fslovar\u002Fpereletnye-ptitsy","14.07.2026",1,[87,91,95],{"label":88,"path":89,"description":90},"Bird migration","\u002Fslovar\u002Fmigraciya-ptic","Why and how birds migrate",{"label":92,"path":93,"description":94},"Resident birds","\u002Fslovar\u002Fosedlye-ptitsy","Birds that stay in the same area year-round",{"label":96,"path":97,"description":98},"Passage migrants","\u002Fslovar\u002Fproletnye-ptitsy","Birds seen only briefly while traveling through a region",{"title":100,"description":101},"Migratory Birds — definition and examples","What makes a bird 'migratory': a fixed seasonal move between a breeding range and a wintering range, with examples from Bird Atlas species pages.",{"loc":83},"slovar\u002Fpereletnye-ptitsy","ydCf4h-XRiq_ckATYMxub9C_3QHHnoo0QtZsQi__FQg",{"ru":80,"es":80},[107,112,116,121,126,131,136,141,146,151,156,161,162,167,172,177,182,186,191,196],{"title":108,"description":109,"path":110,"coverImage":111,"publishedAt":84,"order":81},"Bird Feeder","A bird feeder provides supplementary food, most valuably in winter, and lets birdwatchers observe species up close — but it needs regular cleaning to avoid spreading disease.","\u002Fslovar\u002Fkormushka-dlya-ptic","\u002Fimages\u002Fslovar\u002Fkormushka-dlya-ptic.png",{"title":113,"description":114,"path":89,"coverImage":115,"publishedAt":84,"order":81},"Bird Migration","Bird migration is the regular, seasonal movement of birds between breeding and non-breeding ranges — driven by food availability and daylight, not simply cold weather.","\u002Fimages\u002Fslovar\u002Fmigraciya-ptic.png",{"title":117,"description":118,"path":119,"coverImage":120,"publishedAt":84,"order":81},"Bird Ringing","Bird ringing (banding) attaches a small, uniquely numbered metal or plastic ring to a bird's leg, allowing individuals to be tracked across recaptures and sightings.","\u002Fslovar\u002Fkolcevanie-ptic","\u002Fimages\u002Fslovar\u002Fkolcevanie-ptic.png",{"title":122,"description":123,"path":124,"coverImage":125,"publishedAt":84,"order":81},"Bird of Prey (Raptor)","A bird of prey, or raptor, hunts live vertebrate prey using strong grasping feet and a hooked bill — a functional grouping spanning several unrelated families, including falcons, hawks, and owls.","\u002Fslovar\u002Fpernatyi-hishchnik","\u002Fimages\u002Fslovar\u002Fpernatyi-hishchnik.png",{"title":127,"description":128,"path":129,"coverImage":130,"publishedAt":84,"order":81},"Birdwatching","Birdwatching is the recreational observation and identification of wild birds, ranging from casual garden watching to structured trips to specific sites and seasons.","\u002Fslovar\u002Fbirdwatching","\u002Fimages\u002Fslovar\u002Fbirdwatching.png",{"title":132,"description":133,"path":134,"coverImage":135,"publishedAt":84,"order":81},"Conservation Status of Birds (LC\u002FNT\u002FVU\u002FEN\u002FCR)","Conservation status is a standardized IUCN category — from Least Concern to Extinct — measuring how close a species is to disappearing across its entire range.","\u002Fslovar\u002Fohrannyi-status-ptic","\u002Fimages\u002Fslovar\u002Fohrannyi-status-ptic.png",{"title":137,"description":138,"path":139,"coverImage":140,"publishedAt":84,"order":81},"Downy Chick","A downy chick is a hatchling covered in soft, fluffy natal down rather than true feathers — its exact appearance and mobility depend on whether the species is precocial or altricial.","\u002Fslovar\u002Fpuhovoi-ptenec","\u002Fimages\u002Fslovar\u002Fpuhovoi-ptenec.png",{"title":142,"description":143,"path":144,"coverImage":145,"publishedAt":84,"order":81},"Egg Clutch","A clutch is the full set of eggs a female bird lays in a single nesting attempt — its size varies by species from a single egg to over a dozen.","\u002Fslovar\u002Fkladka-yaic","\u002Fimages\u002Fslovar\u002Fkladka-yaic.png",{"title":147,"description":148,"path":149,"coverImage":150,"publishedAt":84,"order":81},"Egg Incubation","Incubation is the process of keeping eggs at a stable, warm temperature until they hatch, usually by direct body contact through a bare, blood-vessel-rich brood patch.","\u002Fslovar\u002Finkubaciya-yaic","\u002Fimages\u002Fslovar\u002Finkubaciya-yaic.png",{"title":152,"description":153,"path":154,"coverImage":155,"publishedAt":84,"order":81},"Endemic Species","An endemic species occurs naturally in one specific geographic area and nowhere else in the world, making it a priority for conservation attention.","\u002Fslovar\u002Fendemik","\u002Fimages\u002Fslovar\u002Fendemik.png",{"title":157,"description":158,"path":159,"coverImage":160,"publishedAt":84,"order":81},"Migration Flyway","A migration flyway is the broad geographic corridor a population of migratory birds consistently follows between breeding and wintering ranges, often shaped by coastlines and mountains.","\u002Fslovar\u002Fmigracionnyi-put","\u002Fimages\u002Fslovar\u002Fmigracionnyi-put.png",{"title":5,"description":69,"path":83,"coverImage":68,"publishedAt":84,"order":81},{"title":163,"description":164,"path":165,"coverImage":166,"publishedAt":84,"order":81},"Molt in Birds","Molt is the periodic shedding and replacement of feathers, essential for flight efficiency, insulation, and — in many species — seasonal changes in plumage color.","\u002Fslovar\u002Flinka-u-ptic","\u002Fimages\u002Fslovar\u002Flinka-u-ptic.png",{"title":168,"description":169,"path":170,"coverImage":171,"publishedAt":84,"order":81},"Nest Box","A nest box is an artificial cavity built to attract hole-nesting birds where natural tree cavities are scarce, from starling boxes to smaller tit and sparrow boxes.","\u002Fslovar\u002Fskvorechnik","\u002Fimages\u002Fslovar\u002Fskvorechnik.png",{"title":173,"description":174,"path":175,"coverImage":176,"publishedAt":84,"order":81},"Nesting","Nesting is the full process of building or selecting a nest site, laying and incubating eggs, and raising chicks to independence — behavior that varies enormously between bird families.","\u002Fslovar\u002Fgnezdovanie","\u002Fimages\u002Fslovar\u002Fgnezdovanie.png",{"title":178,"description":179,"path":180,"coverImage":181,"publishedAt":84,"order":81},"Nomadic Birds","Nomadic (irruptive) birds move irregularly and unpredictably between areas in response to fluctuating food supply, rather than following a fixed seasonal migration.","\u002Fslovar\u002Fkochuyushchie-ptitsy","\u002Fimages\u002Fslovar\u002Fkochuyushchie-ptitsy.png",{"title":183,"description":184,"path":97,"coverImage":185,"publishedAt":84,"order":81},"Passage Migrants","A passage migrant is a bird seen in a region only briefly, while traveling between a breeding range and a wintering range that both lie elsewhere.","\u002Fimages\u002Fslovar\u002Fproletnye-ptitsy.png",{"title":187,"description":188,"path":189,"coverImage":190,"publishedAt":84,"order":81},"Precocial and Altricial Birds","Precocial chicks hatch mobile, feathered, and able to feed themselves within hours; altricial chicks hatch blind, naked, and entirely dependent on their parents.","\u002Fslovar\u002Fvyvodkovye-i-ptencovye-ptitsy","\u002Fimages\u002Fslovar\u002Fvyvodkovye-i-ptencovye-ptitsy.png",{"title":192,"description":193,"path":194,"coverImage":195,"publishedAt":84,"order":81},"Range (Habitat Range)","A species' range is the total geographic area where it occurs, distinct from habitat, which describes the type of environment it uses within that area.","\u002Fslovar\u002Fareal-obitaniya","\u002Fimages\u002Fslovar\u002Fareal-obitaniya.png",{"title":197,"description":198,"path":93,"coverImage":199,"publishedAt":84,"order":81},"Resident Birds","Resident birds stay within the same general area year-round, neither migrating to a separate wintering range nor undertaking large nomadic movements.","\u002Fimages\u002Fslovar\u002Fosedlye-ptitsy.png",[],[202,203,204],{"label":88,"path":89,"description":90,"coverImage":115},{"label":92,"path":93,"description":94,"coverImage":199},{"label":96,"path":97,"description":98,"coverImage":185},1787114564151]